Thursday, May 4, 2017

Open Source Software List: The Ultimate List

 

 Open Source Software List: The Ultimate List

It's become a annual tradition at Datamation to publish an complete roundup of all the open source projects we've featured throughout the year. This year's update includes a vast trove of open source software: 1,343 different projects, from 138 different categories, including two brand new categories.
This year's open source list has quite a few new additions related to cloud computing, the Internet of Things (IoT) and artificial intelligence (AI). It also has quite a few new projects related to marketing software.
Please note that this is not a ranking. The projects are organized into categories and then listed alphabetically within the categories.
As always, if you know of additional open source software that you'd like to see us cover in future lists, feel free to note them in the Comments section below.
Table of Contents

Popular Open Source Software

Best Open Source Software for Windows 10

Sure, you’re a Windows user – in fact you’re using an up to date Windows OS. But in today’s world, it’s still entirely likely you’re looking for the best open source software for your PC. This list gathers some familiar names with lesser known apps, all with an eye toward boosting your Windows 10 machine. Which app do you think is the best open source software for Win10

Open Source Software: Top Sites

There are countless websites that offer extensive lists of open source software to download. But finding the best open source website is easier said than done. To help, we’ve compiled a list of the very best open source websites – let the downloading begin.

Open Source Replacements for Proprietary Business Intelligence Software

In this aggregation of open source BI tools, you’ll certainly see some famous names: MySQL, Pentaho, along with some names that get less buzz as well. Of course in the rapidly changing business intelligence market, today’s big names could easily be surpassed over time by a little known tool – feature sets change quickly. Which open source BI tool on this list will be most popular in the years ahead?

Open Source Replacements for Windows XP

There’s no debate about it: Windows XP is an aging operating system. For those looking to replace it – and yes, it’s time – with an open source operating system, this is the list for you. This survey of open source operating systems includes superstars like Ubuntu along with solid players like Knoppix. Come on, replace that old Windows OS!

Open Source Replacements for Popular Financial Software

It makes perfect sense: you’re using financial software to track your expenses, so naturally you’re interested in open source financial software. Open source – much of which is a free download – is made for penny pinchers. The open source financial software in this list may save you, in some cases, hundreds of dollars. A penny saved is a penny earned.

Open Source Replacements for Expensive Apps

It’s clear that, as value propositions go, this one’s a no-brainer: replace your expensive apps with low-cost or free open source applications. Certainly there’s debate about feature sets: some commercial software partisans argue that the feature sets for open source applications do not match their commercial counterparts. Undoubtedly the other side disagrees strongly. You can be the judge – download a few open source applications and check them out. Do they compare?

Open Source Replacements for Popular Small Business Software

Open source business software is, in many cases, the ideal solution for small businesses. If you’re as cash-strapped as many SMBs, you’ll certainly want to look at this list of open source business software. Bottom line: free or low cost is better than high priced, even if that requires giving up some familiar software choices to explore options that are lesser known. If money is tight, open source business software can often be a useful option.

Accessibility


Launched in 2013, this site aims to provide information on making other websites accessible to people with a variety of impairments, particularly those who are blind. You can read the content at the link above; if you'd like to contribute, visit the project's GitHub page. Operating System: OS Independent

Accounting

This web-based accounting package was created with small and medium-sized businesses (SMBs) in mind. It includes CRM, work order and invoice capabilities as well as standard accounting features. Check out the online demo to see it in action. Operating System: OS Independent
Another web-based accounting option for SMBs, FrontAccounting boasts inventory tracking and manufacturing management abilities. It's been downloaded more than 200,000 times. Operating System: OS Independent
4. GnuCash
GnuCash combines personal finance software with small business accounting software, which some small business owners find helpful. It can track investments, create graphs, import financial data, set up scheduled transactions and perform standard double-entry accounting. Operating System: Windows, Linux, OS X
LedgerSMB combines ERP and accounting capabilities in a single package, and it also includes a flexible development framework for extending its features. It has been downloaded more than 86,000 times since 2006. Operating System: Windows, Linux, OS X
Used by more than 80,000 businesses, TurboCASH is a flexible accounting package that compares favorably with QuickBooks and Sage. It was created in the UK but also has a chart of accounts and currency features designed for U.S. businesses. Operating System: Windows

App Collection

The OpenDisc project collects many of the most popular open source applications for Windows into one download. You can also get the project on a CD for a donation of $10. Operating System: Windows

Anti-Spam/Email Filtering

8. ASSP
ASSP claims to be "the absolute best SPAM fighting weapon that the world has ever known!" It offers easy, browser-based setup and works with most mail servers. Operating System: OS Independent.
Downloaded more than 1.3 million times, MailScanner is based on SpamAssassin and works with anti-virus software like ClamAV to protect mail servers at companies or ISPs. Support is available through third-party companies. Operating System: OS Independent.
This full-featured mail security solution incorporates anti-spam, anti-virus and other capabilities with an interface that the project creators say is as easy to use as a car radio. Paid support is available. Operating System: Windows, Linux.
This Apache project claims to be the "#1 Enterprise Open-Source Spam Filter." It uses a wide variety of methods to identify and block spam, and it works with nearly all mail servers. Operating System: primarily Linux and OS X, although Windows versions are available.
12. SpamBayes
SpamBayes uses statistical algorithms to calculate the probability that an incoming message is spam, and it adapts over time as spammers change their methods. It's available as a plug-in for many popular email services and clients, including Outlook, Thunderbird and others. Operating System: OS Independent.

Anti-Virus/Anti-Malware

13. ClamAV
One of the most popular open source security applications, ClamAV has been incorporated into many different products and has been called "the de facto standard for mail gateway scanning." The core program works on UNIX-based systems, but the website also offers information on Immunet, a ClamAV-based Windows solution that is available in both free and paid versions. Operating System: Linux, but front-ends and additional versions are available for other OSes.
14. ClamTk
This variation on ClamAV adds an easy-to-use GUI to the popular anti-virus engine. Now ten years old, this is a mature project that is included in many Linux distributions. Operating System: Linux.
This Windows-based version of ClamAV boasts more than 600,000 users. It offers a scanning scheduler, integration with Windows Explorer and Outlook, automatic downloads of the updated malware database and support for Windows 7 and 8. Operating System: Windows.

Artificial Intelligence

16. Caffe
The brainchild of a UC Berkeley PhD candidate, Caffe is a deep learning framework based on expressive architecture and extensible code. It's claim to fame is its speed, which makes it popular with both researchers and enterprise users. According to its website, it can process more than 60 million images in a single day using just one NVIDIA K40 GPU. It is managed by the Berkeley Vision and Learning Center (BVLC), and companies like NVIDIA and Amazon have made grants to support its development.
17. CNTK
Short for Computational Network Toolkit, CNTK is one of Microsoft's open source artificial intelligence tools. It boasts outstanding performance whether it is running on a system with only CPUs, a single GPU, multiple GPUs or multiple machines with multiple GPUs. Microsoft has primarily utilized it for research into speech recognition, but it is also useful for applications like machine translation, image recognition, image captioning, text processing, language understanding and language modeling.
Deeplearning4j is an open source deep learning library for the Java Virtual Machine (JVM). It runs in distributed environments and integrates with both Hadoop and Apache Spark. It makes it possible to configure deep neural networks, and it's compatible with Java, Scala and other JVM languages.
The project is managed by a commercial company called Skymind, which offers paid support, training and an enterprise distribution of Deeplearning4j.
Like CNTK, the Distributed Machine Learning Toolkit (DMTK) is one of Microsoft's open source artificial intelligence tools. Designed for use in big data applications, it aims to make it faster to train AI systems. It consists of three key components: the DMTK framework, the LightLDA topic model algorithm, and the Distributed (Multisense) Word Embedding algorithm. As proof of DMTK's speed, Microsoft says that on an eight-cluster machine, it can "train a topic model with 1 million topics and a 10-million-word vocabulary (for a total of 10 trillion parameters), on a document collection with over 100-billion tokens," a feat that is unparalleled by other tools.
20. H2O
Focused more on enterprise uses for AI than on research, H2O has large companies like Capital One, Cisco, Nielsen Catalina, PayPal and Transamerica among its users. It claims to make is possible for anyone to use the power of machine learning and predictive analytics to solve business problems. It can be used for predictive modeling, risk and fraud analysis, insurance analytics, advertising technology, healthcare and customer intelligence.
It comes in two open source versions: standard H2O and Sparkling Water, which is integrated with Apache Spark. Paid enterprise support is also available.
21. NuPIC
Managed by a company called Numenta, NuPIC is an open source artificial intelligence project based on a theory called Hierarchical Temporal Memory, or HTM. Essentially, HTM is an attempt to create a computer system modeled after the human neocortex. The goal is to create machines that "approach or exceed human level performance for many cognitive tasks."
In addition to the open source license, Numenta also offers NuPic under a commercial license, and it also offers licenses on the patents that underlie the technology.
22. OpenCyc
Developed by a company called Cycorp, OpenCyc provides access to the Cyc knowledge base and commonsense reasoning engine. It includes more than 239,000 terms, about 2,093,000 triples, and about 69,000 owl:sameAs links to external semantic data namespaces. It is useful for rich domain modeling, semantic data integration, text understanding, domain-specific expert systems and game AIs. The company also offers two other versions of Cyc: one for researchers that is free but not open source and one for enterprise use that requires a fee.
23. OpenNN
Designed for researchers and developers with advanced understanding of artificial intelligence, OpenNN is a C++ programming library for implementing neural networks. Its key features include deep architectures and fast performance. Extensive documentation is available on the website, including an introductory tutorial that explains the basics of neural networks. Paid support for OpenNNis available through Artelnics, a Spain-based firm that specializes in predictive analytics.
24. SystemML
First developed by IBM, SystemML is now an Apache big data project. It offers a highly-scalable platform that can implement high-level math and algorithms written in R or a Python-like syntax. Enterprises are already using it to track customer service on auto repairs, to direct airport traffic and to link social media data with banking customers. It can run on top of Spark or Hadoop.
TensorFlow is one of Google's open source artificial intelligence tools. It offers a library for numerical computation using data flow graphs. It can run on a wide variety of different systems with single- or multi-CPUs and GPUs and even runs on mobile devices. It boasts deep flexibility, true portability, automatic differential capabilities and support for Python and C++. The website includes a very extensive list of tutorials and how-tos for developers or researchers interested in using or extending its capabilities.
26. Torch
Torch describes itself as "a scientific computing framework with wide support for machine learning algorithms that puts GPUs first." The emphasis here is on flexibility and speed. In addition, it's fairly easy to use with packages for machine learning, computer vision, signal processing, parallel processing, image, video, audio and networking. It relies on a scripting language called LuaJIT that is based on Lua.

Astronomy

27. Celestia
Travel virtually to anywhere in the known universe at any time with Celestia. It displays hundreds of thousands of celestial bodies as they would appear in the night skies. Operating System: Windows, Linux, OS X.
28. KStars
Similar to Stellarium, KStars lets users view "up to 100 million stars, 13,000 deep-sky objects, all 8 planets, the sun and moon, and thousands of comets and asteroids." It also includes a number of tools helpful for amateur astronomers, such as an observation list, an FOV editor, a sky calendar, supernova alerts and a glossary of technical terms. (Note that in order to use KStars on Windows, you'll have to download KDE for Windows.) Operating System: Windows, Linux
Another option for budding astronomers, this one confines the point of view to planet earth rather than allowing users to zoom throughout the universe, but it is so accurate that it is used by many planetariums. Operating System: Windows, Linux, OS X.

Audio Tools

30. Amarok
Amarok invites users to rediscover their music. It integrates with a variety of Web services and includes features like dynamic playlists, collection management, bookmarking, file tracking and import from other music databases, including iTunes. Operating System: Windows, Linux, OS X, iOS.
31. Ardour
Designed for use by professional audio engineers, musicians, soundtrack editors and composers, Ardour is a complete audio recording, mixing and editing suite. Key features include support for most hardware, flexible recording, unlimited multichannel tracks, unlimited undo/redo and much more. Operating System: Linux, OS X
32. aTunes
This Java-based music player and manager displays complete information—including lyrics—for the song currently playing. It's a good option for users with particularly large music collections. Operating System: OS Independent
33. Audacious
Unlike some audio players, Audacious doesn't use a lot of system resources, so it doesn't degrade system performance when you're using your PC for other tasks as well as listening to music. The latest update offers improved playlist shuffling, easier recording of Internet streams and a better equalizer interface. Operating System: Windows, Linux.
34. Audacity
A perennial favorite among Linux desktop users, Audacity gets hundreds of thousands of downloads per month. It was updated in July with new scrubbing and seeking features, preset effects and improved plug-in installation. Operating System: Windows, Linux, OS X
35. CDex
Downloaded more than 60 million times, CDex is a simple, handy tool for converting CDs to data files. It supports multiple file formats, including WAV, MP3, FLAC, AAC, WMA and OGG. Operating System: Windows.
36. Cdrtools
This suite of command-line tools includes the cdrecord CD/DVD/Blu-ray recording software, as well as tools for reading optical media, extracting audio, and more. It's a mature project that has been around for quite a few years. Operating System: Windows, Linux, OS X.
37. cdrtfe
Cdrtfe serves as a front-end for cdrtools and some other command-line recording applications. It can burn audio CDs, data discs, bootable discs, DVD-Video discs, ISO images and other types of optical media. The latest version supports Windows 10. Operating System: Windows.
Based on an older version of Amarok, Clementine focuses on providing "a fast and easy-to-use interface for searching and playing your music." It supports Internet radio streams, cloud computing services like Dropbox and Google Drive, CUE sheets, tabbed playlists, audio CD playback and much more. Operating System: Windows, Linux, OS X, Android.
39. DeaDBeeF
This self-proclaimed "ultimate music player" supports a very long list of file formats. Key features include cue sheet support, tabbed playlists, cover art display, 18-band graphic equalizer, tag editor, gapless playback and more. Operating System: Linux, Unix, Android.
40. EasyTAG
EasyTAG allows users to view and edit the tag fields on MP3, MP2, MP4/AAC, FLAC, Ogg Vorbis, MusePack, Monkey's Audio, and WavPack files. It includes a tree-based browser and CDDB support for manual and automatic searches. Operating System: Windows, Linux
41. Exaile
Another option for Linux users, Exaile offers both playback and a powerful music manager. Key features include smart playlists, advanced track tagging, multiple plug-ins, automatic album art, lyrics and much more. Operating System: Linux.
This tool was made for audiophiles who like to keep their original music in the lossless FLAC file format. FlacSquisher converts those files to MP3s so that users can take them with them on mobile devices without taking up too much space. Operating System: Windows.
43. Fre:ac
Fre:AC stands for "free audio converter," and it can rip audio CDs or convert among numerous file formats. It's also portable, meaning that you can run it from a USB thumb drive without installing it on your system. Operating System: Windows.
44. Frinika
Java-based Frinika is a lightweight but fairly complete music workstation. It includes a sequencer, soft-synths, real-time effects and recording capabilities. Operating System: OS Independent
45. Giada
Giada describes itself as "a free, minimal, hardcore audio tool for DJs, live performers and electronic musicians." It's not quite as full-featured as the other options on the list, but it is an effective, lightweight looping tool. Operating System: Linux.
Created for "all music enthusiasts," Guayadeque is a full-featured music management system that can handle large file collections. Noteworthy features include a configurable crossfader engine, configurable silence detector for gapless playback, labeling, smart play mode, last.fm support and more. Operating System: Linux
47. Hydrogen
"Professional yet simple and intuitive," Hydrogen is a drum machine for Linux only. The video on the site helps you quickly see how it works and what it can do. Operating System: Windows, Linux, OS X.
48. Jajuk
Java-based Jajuk works on multiple platforms. Aimed at advanced users, it offers a very full feature set as well as an intuitive interface. Operating System: OS Independent.
49. Jams
Formerly a paid app, Jams is now an open source Android music player with an elegant interface. It can connect to Google Play Music for purchasing songs and includes features like tag support, blacklisting, 9-band equalizer, scrobbling, crossfade, album art download and more. Operating System: Android.
50. KMid
This KDE app plays both Midi and karaoke files, making it easy for you to serenade your sweetheart. It includes a piano player interface and also accepts input from external keyboards. Operating System: Windows
"Made by musicians, for musicians," LMMS is a full-featured music production system with plenty of presets and samples built in. Note that despite the word "Linux" in the name, it is available for Windows and OS X as well. Operating System: Windows, Linux, OS X
52. Mixxx
Made for professional DJs, Mixxx offers "everything you need to start making DJ mixes in a tight, integrated package." It supports more than 30 DJ MIDI controllers, integrates with iTunes and includes BPM detection and sync. Operating System: Windows, Linux, OS X.
53. MOC
Simply select a directory, and the MOC (Music On Console) audio player will play all files in that directory. Supported file formats include MP3, Ogg Vorbis, FLAC, Musepack, Speex, WAVE, AIFF, and AU. Operating System: Linux/Unix, OS X
54. Mp3splt
Mp3splt is an audio utility that does just one thing—it lets you cut mp3 and ogg files into smaller files and rename them. It’s especially useful if you need to split an entire album into individual tracks. Operating System: Windows, Linux, OS X
55. MuseScore
If you are a musician, teacher or composer interested in generating your own sheet music, MuseScore makes it very easy and offers most of the same features you'll find in the proprietary software. The website includes some tutorials and plenty of other help to get you started, and the interface is very intuitive. Operating System: Windows, Linux, OS X
Nightingale promises users "a beautiful interface with a wide range of supported audio formats, all with multi-platform support." It has a large library of add-ons that extend its capabilities. Operating System: Windows, Linux, OS X.
57. orDrumbox
Another open source option for creating your own drum loops and feeds, orDrumbox offers an easy-to-use interface. Features include auto-composition, poly-rhythms, an arpeggiator, automatic sounds/track matching , custom soft-synths and low-fi rendering. Operating System: Windows, Linux, OS X.
58. Qmmp
Qmmp, which stands for "Qt-based MultiMedia Player," offers features like support for skins, 10-band equalizer, streaming playback, cover art, cue sheet support and multiple playlists. Its interface is very simple and similar to older apps like Winamp and XMMS. Operating System: Windows, Linux
If your favorite online radio station only offers streaming content, you can turn it into a podcast you can listen to any time with Radio Downloader. It comes with built-in support for BBC content and a helpful "favourites" tab. Operating System: Windows
60. Rhythmbox
Rhythmbox is a Linux-only audio player for the GNOME desktop. The interface and feature set are fairly basic. Operating System: Linux.
61. SoX
This cross-platform command line tool calls itself the "Swiss Army knife of sound processing programs." It can convert files from one type to another, record and play audio files, and add effects. Operating System: Windows, Linux, OS X.
62. TEncoder
This app provides an interface to three other popular open source video tools: FFMPEG, MEncoder and Mplayer. It can convert video files, rip unprotected DVDs, add subtitles, download from YouTube, extract audio or video and more. Operating System: Windows.
This cross-platform player supports album art and lyrics, reverse play, crossfading, trimming, shuffle, repeat, song rating, search, and more. It's also small enough to run on a Raspberry Pi board. Operating System: Windows, Linux, OS X
64. xwax
This Linux-only tool was designed for beat mixing and scratch mixing. Features include needle drops, pitch changes, scratching, spinbacks and rewinds. Operating System: Linux.
65. Yoshimi
Yoshimi is a Linux-only software synthesizer forked from an older version of ZynAddSubFX. The project name comes from a song by The Flaming Lips. Operating System: Linux.
This software synthesizer comes in Windows and Linux versions. Features include real-time, polyphonic, multitimbral and microtonal capabilities and a long list of effects and filters. Operating System: Windows, Linux.

Backup

67. AMANDA
The Advanced Maryland Automatic Network Disk Archiver, or AMANDA, is a popular network backup solution that can save data from Linux, Unix or Windows systems to hard drives, tape or optical media. Zmanda, which sponsors the project, offers commercial products based on the same technology. Operating System: Windows, Linux, OS X.
For standalone systems, Area is an easy-to-use but versatile backup solution. Key features include delta backup, compression, encryption, filters, as-of-date recovery and more. Operating System: Windows, Linux
69. Attic
If you are looking to minimize the amount of storage space you need for backups, consider Attic, which includes built-in deduplication. It also includes optional 256-bit AES encryption and can transfer files to remote hosts via SSH. Operating System: Linux
70. Backup
This Ruby-based tool promises "easy full stack backup operations on UNIX-like systems." It includes a tool for modeling backups. Operating System: Linux, OS X
This tool makes it easier to coordinate and manage backups on your network. It incorporates several of the other tools on this list including Duplicity and rsync. Operating System: Linux
72. BackupPC
Robust enough for enterprise use, BackupPC backs up data from Linux and Windows systems to disk. Noteworthy features include a unique pooling scheme, optional compression, a web interface and support for mobile devices. Operating System: Windows, Linux
Inspired by an older solution called FlyBack, Back in Time takes snapshots of specified directories. It's easy to setup and includes a simple scheduler. Operating System: Linux
74. Bacula
Another option for enterprises, Bacula is a network backup solution that aims to be easy to use and very efficient. Commercial support and services for the solution are available throughBacula Systems. Operating System: Windows, Linux, OS X
75. Bareos
Forked from Bacula, Bareos is a popular open source backup option that is under very active development. Bareos.com offers paid support and services for the tool. Operating System: Windows, Linux, OS X
This "completely automatic" backup solution creates backups continuously and can also create snapshots when desired. It includes encryption and optional RAID capabilities. Operating System: Windows, Linux
77. BURP
Short for "BackUp And Restore Program," BURP is a network backup solution based on librsync (see below). It is designed to be easier to configure than some other open source solutions, and it can do delta backups. Operating System: Windows, Linux
Designed to replace Acronis True Image or Norton Ghost, Clonezilla is useful for both system deployment and backup and recovery. It comes in two flavors: live for standalone systems and SE for network backup or cloning multiple systems at once. Operating System: Linux
Powerful but lightweight, this backup tool takes up only 220KB of space on your drive. It supports multiple languages, has an intuitive interface and includes a scheduler. Operating System: Windows
80. DAR
Disk Archive, a.k.a. DAR, is an older command-line tool for backup. For those who prefer a GUI, one is available through DarGUI. Operating System: Windows, Linux, OS X
This "small but powerful," utility offers incremental backup, filtering and scheduling capabilities. It also boasts a user-friendly interface, and it offers the ability to analyze two sets of files or folders and detect the changes between them. Operating System: Windows
While this utility isn't a complete system backup solution, it does back up Windows drivers. It can also remove unwanted drivers. Operating System: Windows
83. Duplicity
Based on the librsync library, Duplicity creates encrypted archives and uploads them to remote or local servers. It can use GnuPG to encrypt and sign archives if desired. Operating System: Linux
84. FOG
FOG offers cross-platform cloning and imaging capabilities for networks of any size from 5 to 50,000 systems. It boasts that it "offers commercial-grade support at no cost." Operating System: Linux, Windows, OS X.
A tool for standalone systems, FreeFileSync aims to save users time when setting up and running backups. It is cross-platform and includes 64-bit support. Operating System: Linux, Windows, OS X
86. FullSync
Although it was designed to help web developers push updates to their sites, FullSync can also be used by anyone to create backups. Key features include multiple modes, flexible rules, buffered filesystems, support for multiple file transfer protocols and more. Operating System: Linux, Windows, OS X
87. Grsync
Grsync takes the older rsync synchronization tool and adds an easy-to-use GUI. Noteworthy features include unlimited sessions, highlighted errors, batch capabilities and more. Operating System: Linux, Windows, OS X
Like Grsync, LuckyBackup was also based on rsync. It has won several awards, but development on this project has slowed. Operating System: Linux, Windows
For Linux and FreeBSD only, Mondo Rescue is a disaster recovery solution that supports tape, disk, network or optical media backups. According to its website, its users include "Lockheed-Martin, Nortel Networks, Siemens, HP, IBM, NASA's JPL, the US Dept of Agriculture, dozens of smaller companies." Operating System: Linux, Free BSD
90. Obnam
Easy-to-use and secure, Obnam is a snapshot backup solution with built-in deduplication and encryption capabilities. It stores data to hard disks or online via SFTP. Operating System: Linux
91. Partimage
This tool saves partitions of drives as image files, making it useful for backup or installing the same image on multiple systems. It can run across networks or on a standalone PC. Operating System: Linux
92. Redo
Redo boasts that it can get a crashed system back up and running in as little as 10 minutes. It's very easy to use and has bare-metal restore capabilities. Operating System: Windows, Linux
93. Rsnapshot
As you might expect from the name, this utility makes a snapshot of your file system for remote or local backup. According to the website, it can be set up in just a few minutes. Operating System: Linux, OS X
94. Rsync
Rsync is a Unix-based file-transfer utility that has synchronization capabilities that make it suitable for creating backups or mirroring. It's a useful tool but is best used by advanced users. Operating System: Linux, Windows, OS X
95. SafeKeep
For Linux users only, SafeKeep focuses on security and simplicity. It's a command line tool that is a good option for a small LAN. Operating System: Linux
This tool allows you to backup your text messages and call logs on Gmail. You can also transfer data from Gmail back to your phone. Operating System: Android
Designed to be as easy to use as possible, SnapBackup backs up files with just one click. It can copy files to a flash drive, external hard drive or the cloud, and it includes compression capabilities. Operating System: Windows, Linux, OS X
98. Synkron
While this app is focused primarily on synchronization, it can be used for creating backups as well. Key features include analysis capabilities, blacklisting, restores and cross-platform support. Operating System: Windows, Linux, OS X
99. Unison
Like Synkron, Unison is a file synchronization tool. It can copy files between any two systems connected to the internet, and it has features in common with source code management tools as well as with backup utilities. Operating System: Windows, Unix
100. UrBackup
This client-server backup solution does both image and file backups. It promises "both data safety and a fast restoration time." Operating System: Windows, Linux
101. Weex
The Weex developers intended it primarily as a tool for pushing content to websites, but it can also be used to synchronize or backup files. It supports FTP file transfer. Operating System: Windows, Linux
Averaging more than 50,000 downloads every week, this tool is a very popular way to copy a disk image to a new machine. It's very useful for systems administrators and developers. Operating System: Windows
103. XSIbackup
XSIbackup can backup VMwareESXi environments version 5.1 or greater. It's a command line tool with a scheduler, and it runs directly on the hypervisor. Operating System: VMwareESXi

Big Data Tools

104. Alluxio
Formerly known as Tachyon, Alluxio describes itself as "a memory-centric distributed storage system enabling reliable data sharing at memory-speed across cluster frameworks." It works with tools like Spark and Hadoop to speed performance on big data queries. Operating System: Linux, OS X
105. Ambari
Part of the Hadoop ecosystem, this Apache project offers an intuitive Web-based interface for provisioning, managing, and monitoring Hadoop clusters. It also provides RESTful APIs for developers who want to integrate Ambari's capabilities into their own applications. Operating System: Windows, Linux, OS X.
106. Avro
This Apache project provides a data serialization system with rich data structures and a compact format. Schemas are defined with JSON and it integrates easily with dynamic languages. Operating System: OS Independent.
107. Cascading
Cascading is an application development platform based on Hadoop. Commercial support and training are available. Operating System: OS Independent.
108. Chukwa
Based on Hadoop, Chukwa collects data from large distributed systems for monitoring purposes. It also includes tools for analyzing and displaying the data. Operating System: Linux, OS X.
Data Torrent has been around a while, but it first open sourced its Core RTS technology in June of this year. It claims to be "the industry's only open source enterprise-grade unified stream and batch platform." It comes in community, standard and enterprise versions. Operating System: Linux
110. Disco
Originally developed by Nokia, Disco is a distributed computing framework that, like Hadoop, is based on MapReduce. It includes a distributed filesystem and a database that supports billions of keys and values. Operating System: Linux, OS X.
111. Flume
Flume collects log data from other applications and delivers them into Hadoop. The website boasts, "It is robust and fault tolerant with tunable reliability mechanisms and many failover and recovery mechanisms." Operating System: Linux, OS X.
112. Genie
Created by Netflix, Genie allows IT administrators to manage Hadoop jobs running on cloud computing services. Netflix uses it to run many thousands of Hadoop jobs every day. Operating System: Windows, Linux, OS X
113. Hadoop
This Apache-sponsored project is the best-known big data tool available. Numerous companies, including Amazon Web Services, Cloudera, Hortonworks, IBM, Pivotal, SyncSort and VMware, offer related products or commercial support for Hadoop. Well-known users include Alibaba, AOL, eBay, Facebook, Google, Hulu, LinkedIn, Spotify, Twitter and Yahoo. Operating System: Windows, Linux, OS X
HDFS is the file system for Hadoop, but it can also be used as a standalone distributed file system. It's Java-based, fault-tolerant, highly scalable and highly configurable. Operating System: Windows, Linux, OS X.
115. HPCC
This alternative to Hadoop also offers massive parallel processing and storage of big data workloads. Paid enterprise services are available. Operating System: Linux
116. Hypertable
Very popular with Web companies, Hypertable was developed by Google as a way to make databases more scalable. Its users include Baidu, eBay, Groupon and Yelp. It is compatible with Hadoop, and commercial support and training are available. Operating System: Linux, OS X
117. Ignite
This Apache project describes itself as "a high-performance, integrated and distributed in-memory platform for computing and transacting on large-scale data sets in real-time, orders of magnitude faster than possible with traditional disk-based or flash technologies." The platform includes data grid, compute grid, service grid, streaming, Hadoop acceleration, advanced clustering, file system, messaging, events and data structure capabilities. Operating System: OS Independent.
118. Kudu
Currently in beta trials, Kudu is an Apache project that is part of the Hadoop ecosystem. It combines a simple data model with columnar storage, low latency and distributed architecture. Operating System: Windows, Linux, OS X
119. Lipstick
This Netflix project provides an easy-to-understand graphical representation of Hadoop Pig jobs. It updates as the job executes so that administrators and developers no longer need to sift through log data. Operating System: Windows, Linux, OS X
120. Lucene
Java-based Lucene performs full-text searches very quickly. According to the website, it can index more than 150GB per hour on modern hardware, and it includes powerful and efficient search algorithms. Development is sponsored by the Apache Software Foundation. Operating System: OS Independent.
121. Lumify
Created by a company called Altamira Technologies, Lumify describes itself as an "open source big data analysis and visualization platform." It makes it easy to create 2D or 3D graphs that show the relationship between entities or to overlay data on maps. For those who are interested in learning more about how it works, the website offers several videos that show Lumify in action, and it also has a demo site that allows users to upload their own data and try out the software. Operating System: Linux.
122. MapReduce
An integral part of Hadoop, MapReduce is a programming model that provides a way to process large distributed datasets. It was originally developed by Google, and it also used by several other big data tools on our list, including CouchDB, MongoDB and Riak. Operating System: OS Independent.
123. Mesos
Apache Mesos is a resource abstraction tool that makes it possible for enterprises to treat their entire data center as a single pool of resources, and it is popular with companies that are also running Hadoop, Spark and similar applications. Organizations that use it include Airbnb, CERN, Cisco, Coursera, Foursquare, Groupon, Netflix, Twitter and Uber. Operating System: Linux, OS X
124. Oozie
This workflow scheduler is specifically designed to manage Hadoop jobs. It can trigger jobs by time or by data availability, and it integrates with MapReduce, Pig, Hive, Sqoop and many other related tools. Operating System: Linux, OS X.
125. Pandas
The Pandas project includes data structures and data analysis tools based on the Python programming language. It allows organizations to use Python as an alternative to R for big data analysis projects. Operating System: Windows, Linux, OS X.
126. Pig
Apache Pig is a platform for distributed big data analysis. It relies on a programming language called Pig Latin, which boasts simplified parallel programming, optimization and extensibility. Operating System: OS Independent.
127. Pinot
Developed by LinkedIn and open sourced in June 2015, Pinto is a distributed OLAP datastore that enables real-time scalable analytics. Key features include column orientation, pluggable indexing technology, data ingestion from Kafka and Hadoop and support for a SQL-like language. Operating System: Windows, Linux, OS X
From Fragmentation to Connect
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Pivotal, a spinoff of EMC and VMware, announced earlier this year that they would be open sourcing key pieces of their big data suite, including GemFire, Greenplum Database and HAWQ. Gemfire helps organizations build data-driven applications, Greenplum is an analytics-enabled database, and HAWQ is a SQL analytics engine for Hadoop. Operating System: Windows, Linux, OS X
129. Presto
Developed by Facebook, Presto describes itself as "an open source distributed SQL query engine for running interactive analytic queries against data sources of all sizes ranging from gigabytes to petabytes." Facebook says that it uses it for queries against a 300PB data warehouse, and other users include Airbnb and Dropbox. Operating System: Linux
130. Solr
This "blazing-fast" enterprise search platform claims to be highly reliable, scalable and fault tolerant. The companies using it include AT&T, Ticketmaster, Comcast, Instagram, Netflix, IBM, Adobe and SAP Hybris. Operating System: OS Independent
131. Spark
Apache Spark boasts that it can "run programs up to 100x faster than Hadoop MapReduce in memory, or 10x faster on disk." Organizations "powered by" Spark include Amazon, Baidu, Groupon, Hitachi Solutions, IBM, MyFitnessPal, Nokia and Yahoo. Operating System: Windows, Linux, OS X
132. Sqoop
Enterprises frequently need to transfer data between their relational databases and Hadoop, and Sqoop is one tool that gets the job done. It can import data to Hive or HBase and export from Hadoop to RDBMSes. Operating System: OS Independent.
133. Storm
Apache Storm offers to do for real-time data what Hadoop does for batch data. Its website lists The Weather Channel, Twitter, Yahoo, WebMD, Spotify, Verisign, Flipboard and Klout among its users. Operating System: Linux
134. Samza
Originally developed by LinkedIn, this Apache top-level project does distributed stream processing. It relies on the Kafka messaging system as well as Hadoop YARN distributed processing technology. Operating System: Windows, Linux, OS X
135. Terracotta
Calling its BigMemory technology "the world's premier in-memory data management platform," Terracotta boasts 2.1 million developers and 2.5 million deployments of its software. The company also offers commercial versions of its software, plus support, consulting and training services. Operating System: OS Independent.
136. Tez
Built on top of Apache Hadoop YARN, Tez is "an application framework which allows for a complex directed-acyclic-graph of tasks for processing data." It allows Hive and Pig to simplify complicated jobs that would otherwise take multiple steps. Operating System: Windows, Linux, OS X.
137. Zookeeper
This administrative big data tool describes itself as "a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services." It allows nodes within a Hadoop cluster to coordinate with each other. Operating System: Linux, Windows (development only), OS X (development only).

Billing

138. jBilling
Downloaded more than 120,000 times, jBilling claims to be "world's leading open source enterprise billing solution." It's particularly good for subscription-based billing, and notable customers include Deutsche Telecom, Constant Contact and Rackspace. In addition to the free version, paid support and services are available. Operating System: OS Independent
This web-based invoicing system is easy to use, sending electronic invoices as PDF files. You can download the code and host it on your own server or use the hosting services provided by Smarter Invoices. Operating System: OS Independent.
140. Siwapp
Another Web-based invoicing option, Siwapp allows users to create professional-looking, secure invoices with a minimum amount of hassle. Check out the screenshots and demo on the site to get a feel for how easy it is to use. Operating System: OS Independent.

Bitcoin

141. OpenBazaar
Formerly known as DarkMarket, this project allows users to trade BitCoin for goods and services freely. Based on BitTorrent technology, it emphasizes privacy and requires no fees for trades. It is currently in beta trials. Operating System: Windows, Linux, OS X

Blogging

B2evolution can run a standalone blog, multiple blogs or an entire website. It also includes features for setting up a community and marketing your site, and lots of information about hosting is available on the website. Operating System: OS Independent
143. Ghost
Downloaded more than 340,000 times, Ghost is an open source blogging platform based on Node.js. You can run it on your own Web server for free or use the hosted service, with prices starting at $10 a month. Operating System: Windows, Linux, OS X.
144. WordPress
Used by more than 60 million people and organizations, WordPress is one of the most popular blogging platforms available. Users can host their own blogs using the open source software or use the service provided at WordPress.com. Microsoft has also partnered with the organization on Scalable WordPress, a Web application that runs on Azure. Operating System: Windows, Linux, OS X, iOS, Android, BlackBerry, Windows Phone, others

Browsers

145. Chromium
Chromium is the open source project behind Google's Chrome browser. It aims to be safer, faster and more stable than other browsers. Operating System: Windows, Linux, OS X, Chrome OS, iOS, Android
146. Dooble
Less well-known than some of the other open source browsers, Dooble was created in order to offer better privacy on the Web. It encrypts most of the information it saves, and it includes the option of automatically deleting cookies. Operating System: Windows, Linux, OS X
147. Firefox
According to NetMarketShare, more than 13 percent of people use Firefox as their Web browser. It's made by Mozilla, which has been named the "most trusted Internet company for privacy." Operating System: Windows, Linux, OS X, Android
Designed for privacy protection, the Tor browser cloaks the identity of users by bouncing communications of various servers around the world. It can be installed on a system or run from a thumb drive. Operating System: Windows, Linux, OS X

Bugtrackers

Boasting thousands of users, BugTracker.NET is easy to use and highly configurable. It supports Subversion, Git, and Mercurial, and the website includes a helpful demo and a link to comparisons of various bug tracking systems. Operating System: Windows
150. Bugzilla
A favorite in the open source community, Bugzilla is used by Mozilla, the Linux Foundation, GNOME, KDE, Apache, LibreOffice, Open Office, Eclipse, Red Hat and Novell, among others. Key features in this bugtracker include advanced search capabilities, email notifications, scheduled reports, time tracking, excellent security and more. Operating System: Windows, Linux, OS X
151. FlySpray
FlySpray describes itself as "an uncomplicated, Web-based bug tracking system written in PHP for assisting with software development." It supports multiple databases, including MySQL and PGSQL, and it's easy to use. Operating System: OS Independent
152. GNATS
GNATS is the Gnu project's bug tracking system. Gnatsweb provides a web interface for the command line tool, and several third-party interfaces are also available. Operating System: OS Independent
153. MantisBT
This Web-based bug tracker integrates with most SQL databases and can be accessed with any browser. It's easy to install and has an enormous list of features. Operating System: Windows, Linux, OS X

Business Intelligence (BI)

154. BIRT
BIRT isn't a complete BI suite; instead, it focuses on technology that can be "used to create data visualizations and reports that can be embedded into rich client and web applications." It is sponsored by OpenText, Innovent Solutions and IBM. Operating System: Windows, Linux, OS X
155. Jaspersoft
This popular business intelligence suite is available in a Cloud Analytics version that runs on Amazon Web Services. It also comes in both free and paid versions for on-premise deployment. Operating System: OS Independent.
This Java-based reporting tool can create static or dynamic reports and charts. It can accept data from SQL, Excel, XML and other sources, and it can create PDF, XML or application-specific files. Operating System: OS Independent
157. KNIME
KNIME offers a free, open source Analytics Platform, with several commercial extensions available; these include Personal Productivity, Partner Productivity, TeamSpace, Server, Big Data Extension and Cluster Execution. It claims to be "quick to deploy, easy to scale, intuitive to use and open to all." Operating System: Windows, Linux, OS X
158. OpenI
OpenI strives to help enterprises go from "data to insights in 72 hours with open source." It's a reporting tool that integrates with other open source BI solutions and can be deployed to Amazon Web Services very easily. Operating System: OS Independent.
159. Pentaho
Now owned by Hitachi Data Systems, Pentaho describes itself as "a comprehensive data integration and business analytics platform." Its customers include Caterpillar, Halliburton, BR and Nasdaq. It allows organizations to integrate big data from a variety of sources, including Hadoop, NoSQL databases, analytic databases and relational databases. It then enables interactive analysis, reporting and visualizations, allowing users to create customized dashboards that suit their unique purposes.
The open source version of the Pentaho software is available on the Community website. In addition, the company offers a free thirty-day trial of its paid enterprise software, and it offers a variety of paid services like custom visualizations, training, enterprise support, consulting, certification and technical support. Operating System: Windows, Linux, OS X
160. SpagoBI
SpagoBI is an open source business intelligence and big data analytics platform. The software is completely free, but paid user support, maintenance, consulting and training are available for purchase. It includes tools for reporting, multidimensional analysis (OLAP), charts, location intelligence, data mining, ETL and more. It also integrates with popular in-memory processing engines and enables real-time processing. Operating System: OS Independent

Business Process Management (BPM)

161. Activiti
Designed for business people, developers and systems administrators, Activiti is a lightweight workflow and BPM solution. Paid enterprise support is available through Alfresco. Operating System: OS Independent
Bonita claims to be "the most powerful BPM-based application platform." It comes in community and subscription editions, and paid training and consulting are also available. Operating System: OS Independent
Award-winning ProcessMaker offers tools to help enterprises automate workflow processes as well as performing full-scale BPM. It comes in community, enterprise and cloud editions. Operating System: Windows, Linux.

CAD

164. Archimedes
Designed with architects in mind, Archimedes is a less full-featured CAD modeling tool. It is based on Eclipse's Rich Client Platform and is highly extensible. Operating System: Windows, Linux, OS X
165. BRL-CAD
Early development activity on this very mature project began way back in 1979, and the U.S. military has been using it to model weapons systems for more than twenty years. It includes more than 400 tools for constructive solid geometry modeling. Operating System: Windows, Linux, OS X, others
166. FreeCAD
Useful for hobbyists, educators and experienced CAD professionals, FreeCAD is a general purpose 3D modeling tool. It has been around since 2001 and has a very full set of features. Operating System: Windows, Linux, OS X, others

Charts

167. GraphViz
Another alternative for creating network diagrams, GraphViz lets you use simple text or GXL (a variant of XML) to describe charts, and then it does the drawing work for you. See the Gallery for examples of the types of graphics it can create. Operating System: Windows, Linux, OS X.

Chemistry

168. Avogadro
For more advanced students and professional chemists, Avogrado offers an intuitive interface for creating visualizations of molecules. The website also includes some tips for educators on integrating Avogadro into the classroom. Operating System: Windows, Linux
169. Jmol
This java-based app lets students create diagrams of atoms, molecules, macromolecules, crystals, and more. The site includes a handbook and tutorials for helping you learn how to use the software. Operating System: OS Independent.
170. Kalzium
Need help with introductory chemistry? This KDE app allows students to explore the periodic table, and it comes complete with a molecular weight calculator, an isotope table, a 3D molecule editor and an equation solver for stoichiometric problems. (Note that in order to use Kalzium on Windows, you'll have to download KDE for Windows.) Operating System: Windows, Linux

Cinema Camera

171. AXIOM Beta
Made by a company called apertus, the AXIOM Beta is the world's first open source cinema camera. Beta prototypes began shipping in August, and the company has a well-developed road map for eventually shipping a complete device based on a modular open source hardware concept. Operating System: Linux

Classroom Management

172. iTALC
Intelligent Teaching and Learning with Computers, aka iTALC, gives teachers the tools they need to manage a computer-based classroom without the high license fees of commercial software. Key features include remote control, demo viewing, overview mode, workstation locking and VPN access for off-site students. Operating System: Windows, Linux

Cloud Infrastructure

173. AppScale
AppScale allows users to run applications based on Google App Engine on any infrastructure. It is used by organizations like the World Wildlife Federation, Chico's and Google itself. Operating System: Linux.
Cloud Foundry offers open source tools for building a platform as a service. Claiming to be "built by industry leaders for industry leaders," it lists IBM, Pivotal, Hewlett Packard Enterprise, VMware, Intel, SAP and EMC as its supporters. Operating System: Linux
175. CloudStack
This turnkey IaaS solution forms the basis for many public and private clouds. It has an extremely long list of users that includes Alcatel-Lucent, Apple, Autodesk, BT, CA Technologies, Citrix, Cloudera, Dell, Fujitsu, SAP and Verizon. Operating System: OS Independent
A Dell project, Dasein Cloud is "an open source cloud abstraction library for Java." It allows developers to write applications once that can be translated to any cloud provider's model. Operating System: Linux.
177. Eucalyptus
Now managed by Hewlett Packard Enterprise (HPE), Helion Eucalyptus enables hybrid cloud computing by allowing organizations to build private clouds that are compatible with Amazon Web Services (AWS), which. Paid support is available from HPE. Operating System: Linux.
178. FOSS-Cloud
With FOSS-Cloud, users can build their own public or private cloud computing environments. It includes tools for VDI, IaaS, PaaS, SaaS and cloud storage. Operating System: Windows, Linux.
179. ManageIQ
This cloud management solution is the open source project behind Red Hat CloudForms. It enables services like chargebacks, service orchestration, lifecycle management and automated workflows, as well as enabling hybrid cloud environments. Operating System: Linux, VMware
180. Oneye
Forked from eyeOS, which became closed source after version 2.0, Oneye allows users to set up their own servers for cloud desktop functionality. There is a demo available on the website. Operating System: Linux.
181. OpenNebula
OpenNebula promises "the simplest could deployment and management experience." Paid support, training, engineering and consulting are available through OpenNebula Systems. Operating System: Linux.
182. openQRM
Downloaded more than 400,000 times, the open source version of openQRM offers free cloud computing software that is suitable for small deployments. It also comes in multiple paid enterprise editions, and the company behind the project also offers paid hardware/software bundles and a variety of related services. Operating System: Linux.
183. OpenShift
This Red Hat project aims to make it easy for enterprises to develop, host and scale cloud-based applications. Red Hat offers a public PaaS under the OpenShift name, as well as the open source software and an enterprise version for organizations that want to build a private PaaS. Operating System: Linux.
184. OpenStack
This very popular cloud computing platform claims that "hundreds of the world's largest brands" rely on it every day. Its sponsors include AT&T, Ubuntu, Hewlett Packard Enterprise, IBM, Intel, Rackspace, Red Hat, SUSE, Cisco, Dell, EMC, Symantec and many other well-known technology firms. Operating System: OS Independent
185. ownCloud
Designed to help users set up their "own cloud," this project emphasizes file syncing and sharing, as well as collaboration capabilities. A paid enterprise version is available through OwnCloud.com. Operating System: Windows, Linux.
186. Roboconf
This tool makes it easier to deploy applications to the cloud or other distributed computing environments. It supports many public cloud services, including AWS, Microsoft and Vmware, as well as most private cloud environments. Operating System: OS Independent
187. Scalr
This cloud management platform has been highly ranked by market research firms, and it simplifies the process of managing multiple cloud environments. Its notable users include Expedia, Samsung, the NASA Jet Propulsion Laboratory, Accenture, Sony and Autodesk. Operating System: Linux
188. Synnefo
Co-financed by Greece and the European Union, Synnefo offers a complete open source cloud computing stack written in Python. It uses OpenStack APIs to simplify management, and it also relies on Google Ganeti for cluster management and Archipelago for storage management. Operating System: Linux.

Cloud Storage

189. Camlistore
Content-Addressable Multi-Layer Indexed Storage, or Camlistore for short, offers "formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data in the post-PC era." Stored data can be accessed from any device. Note that it is for more technically minded users, not beginners. Operating System: Linux
190. CloudStore
An alternative to Dropbox, CloudStore synchronizes data between a system and online storage. Its features include strong encryption, password-less authentication, flexible synchronization, fast setup and auto-resumes for interrupted data transfers. Operating System: Linux
191. Cozy
Cozy invites individuals to "store, sync, and share your data just the way you want it" by setting up their own personal cloud. It hopes to evolve into "a universal tool that can help you organize your life and make you more productive by automating routine tasks." Operating System: Linux
192. DREBS
Designed for Amazon Web Services users, DREBS stands for "Disaster Recovery for Elastic Block Store." It runs on Amazon's EC2 services and takes snapshots of EBS volumes for disaster recovery purposes. Operating System: Linux
193. Duplicati
Duplicati works with cloud storage services like Amazon, Windows OneDrive, Google Drive and Rackspace to create encrypted backups. It does a full backup on first use and incremental backups after that. Operating System: Windows, Linux, OS X
194. DuraCloud
With DuraCloud, users can backup their files to multiple cloud storage providers at once or move their files from one cloud to another at will. In addition to the open source software, it is also offered as a paid service. Operating System: Windows, Linux, OS X.
195. FTPbox
This tool also allows users to set up their own cloud storage solution. And as you might guess from the name, it transfers files via FTP. Operating System: Windows
196. LipSync
Another option for setting up a DropBox-like service for yourself, LipSync is a very lightweight tool based on OpenSSH, rsync and lsyncd. The project was born as an idea in a blog post. Operating System: Linux
197. Pydio
Formerly known as AjaXplorer, Pydio offers enterprise-class cloud storage designed to meet the needs of developers and system administrators. Downloaded more than a million times, it claims to be scalable, secure, highly flexible and loved by end users. A paid enterprise distribution is available. Operating System: Windows, Linux (Android and iOS clients available)
198. Rockstor
Rockstor offers several open source storage solutions, including cloud storage servers for individuals and SMBs. It also offers an open source NAS solution. Paid support is available. Operating System: Linux
199. SeaFile
SeaFile is both an open source project for setting up cloud storage with client-side encryption and a paid cloud service with the same capabilities. It's enterprise-ready and promises fast performance Operating System: Windows, Linux, OS X, Android, iOS
200. Sheepdog
According to its website, Sheepdog is "a distributed object storage system for volume and container services and manages the disks and nodes intelligently." It supports snapshotting, cloning and thin provisioning, and it is compatible with OpenStack Swift and Amazon S3. Operating System: Linux
201. Skylable
Downloaded more than 285,000 times, Skylable allows users to create their own object storage solution that is compatible with Amazon's S3 service. A paid, supported version is also available. Operating System: Windows, Linux, OS X
With SparkleShare, you create a special folder on your system that is automatically synchronized with a host folder. It's a good option for collaboration, but less than ideal for full system backups. Operating System: Windows, Linux, OS X
203. StackSync
This tool describes itself as "the open source personal cloud for organizations." Like Dropbox, it syncs files across multiple devices, and it also includes client-side encryption for security. Operating System: Windows, Linux
204. Syncany
Syncany can encrypt and sync files stored on any cloud storage service. It is still an alpha release, but is working. Operating System: Windows, Linux, OS X
205. Syncthing
Yet another DropBox replacement, Syncthing allows users to choose where their data is stored—on their own servers or a cloud service. It runs on any operating system and includes an easy-to-use Web GUI. Operating System: Windows, Linux, OS X
206. Unison
Another file synchronization tool, Unison can handle changes made to multiple copies of a file at the same time, making it a good option for distributed development teams or enterprise collaboration as well as for backup needs. It can work cross-platform and transfers files via SSH. Operating System: Windows, Linux, OS X,

Collaboration/Groupware

207. Collabtive
Similar to Basecamp, Collabtive offers web-based project management that includes time-tracking and reporting. Download the software and host it yourself, or purchase on a SaaS basis. Operating System: OS Independent.
208. cyn.in
This groupware tool includes wikis, blogs, file repositories, event calendars, bookmark directories, discussion boards and multimedia galleries. It comes in free and commercially supported versions, and it is also available as an on-demand cloud service. Operating System: Windows, Linux, OS X.
209. EGroupware
EGroupware emphasizes flexibility, offering configurable custom fields and making it easy to integrate data from other applications. In addition to the free community edition, it also comes in a full version for on-premise deployment and a cloud version with several pricing tiers. Operating System: OS Independent.
Feng Office boasts more than 2 million users at organizations like University of California Berkeley, Airbus, NASA, Porsche Design, Xerox and the NBA. It comes in both free and paid community editions, as well as professional and enterprise editions and the Feng Sky cloud-based option. Operating System: Windows, Linux, OS X.
Group-Office combines enterprise CRM and groupware features like calendar and email. The paid professional version adds helpdesk, mobile sync, time-tracking, projects and document editing. A hosted cloud version is also available. Operating System: OS Independent.
212. K-9
This is an alternative email client with features like search, multi-folder sync, flagging, filing, signatures, PGP and more. It supports Exchange, IMAP and POP3 mail servers. Operating System: Android
Open Atrium describes itself as "a team collaboration tool with a kick of open source hotness." It includes blog, calendar, sharebox, notebook, case tracker and dashboard capabilities. Operating System: OS Independent
214. Seafile
This collaboration solution includes cloud storage, mobile document access, file syncing, messaging and other capabilities. It's available in free or paid private server versions or as a cloud-based service. Operating System: Linux.
215. TeamLab
TeamLab combines document editing, mail, CRM and project management into a single package. Download the open source version, pay for a supported enterprise version, or use the hosted cloud version. Unlike most other projects, TeamLab also offers a free cloud version for non-profits. Operating System: OS Independent.
216. TUTOS
Short for "The Ultimate Team Organization Software," includes group calendar, email, time tracking, document management and project management. In addition, it also offers special features for developers, like a bug tracker, test support and some Scrum tools . Operating System: Linux
217. Zarafa
A complete communication tool, Zarafa offers Web-based meetings and file management as well as standard calendar and email capabilities. It also offers mobile sync and secure mail. A variety of paid subscription plans are available; for the free version, click the community tab on the website. Operating System: Linux

Compression

218. 7-zip
This helpful utility can compress files 30-70 percent more than the well-known WinZip utility. It addition to its unique 7z file format, it can also pack and unpack a variety of other archive file formats. Operating System: Windows, Linux, OS X
This award-winning app can convert among a wide variety of archive file formats. The latest version can read 52 different formats and write to 20. Operating System: Windows
With this tool, users can unpack nearly three dozen different types of compressed files and create UPX, ZIP or 7Z files. It includes encryption capabilities and the ability to create self-extracting archives. Operating System: Windows
221. Caesium
This helpful app compresses images up to 90 percent, making it easier to e-mail them or upload them to your favorite Web site. It supports most common image formats, including JPG, PNG, GIF, BMP, and WMF. Operating System: Windows
222. J7Z
This tool offers the same functionality at 7-Zip with a slightly different interface. It was designed to speed up the compression process for certain types of jobs. Operating System: Windows
223. Keka
This Mac-only archiving tool can extract from 13 different compression formats and create seven. The default compression option is a port of 7-zip. Operating System: OS X
KGB claims to be able to compress files even more than 7-zip. It also includes built-in AES-256 encryption. Operating System: Windows
225. PeaZip
One of the most versatile compression tools available, PeaZip can open more thn 150 different types of archive file formats. It also includes security features like encryption, two-factor authentication, secure delete and much more. Operating System: Windows, Linux, OS X.

Containerization

226. cAdvisor
Short for "Container Advisor," cAdvisor is a Google project that monitors container performance and resource usage. It is intended for use with Docker. Operating System: Linux
227. Docker
Docker has quickly established itself as the dominant platform in the relatively new field of containerization. Many of the biggest names in technology, including Amazon, Microsoft, IBM, Hewlett Packard Enterprise, Red Hat, Rackspace and Canonical are building or offering products that extend or use Docker technology. Operating System: Windows, Linux, OS X
228. Kubernetes
Developed by Google, Kubernetes is an open source container management solution. It is highly scalable, running billions of containers in Google's data centers, as well as containers at Viacom, Ebay and Wikimedia. Note that in order to use it you will need Docker and a Google Cloud Platform Account. Operating System: Linux, OS X.
This group oversees three separate containerization-related projects: LXC, a set of tools for containerization; LXD, a descendant of LXC which provides a more intuitive user experience; CG Manager container group manager daemon and the LXCFS filesystem. Its stated goal is "to offer a distro- and vendor-neutral environment for the development of Linux container technologies. Operating System: Linux
230. OpenVZ
While it's not nearly as well-known as Docker, OpenVZ also offers open source containerization technology. It provides the basis for a commercial product called Odin Virtuozzo. Operating System: Linux
231. Rkt
Part of the CoreOS operating system, Rkt describes itself as "the next-generation container manager for Linux clusters." It emphasizes security and simplicity, and it ships in ArchLinux, Fedora and several other Linux distributions. Operating System: Linux, OS X.

Content Management and Wikis

232. Alfresco
Similar to Microsoft SharePoint, Alfresco's community edition offers enterprise content management that "helps you regain control of critical business content, strengthen compliance, optimize processes and make collaboration easy." It also comes in a paid enterprise version called Alfresco One, and a cloud-based version which makes the software available on an SaaS basis. Operating System: Windows, Linux, OS X.
233. Armstrong
First released in 2011, Armstrong is a content management system specifically designed to meet the needs of news organizations. It was developed by The Bay Citizen and the Texas Tribune. Operating System: OS Independent
234. BIGACE
While BIGACE is used by many smaller organizations, it's multi-site, multi-language, and multi-user capabilities make it a possibility for larger enterprises looking for a Web CMS. Key features include a WYSIWIG editor, templates and stylesheets, and permission management. Operating System: Windows, Linux, Unix
235. Bitweaver
Bitweaver aims to make it easy for non-technical staff, like the marketing team, to add content to corporate or small business websites. It includes tools for adding articles, blogs, calendars and image galleries, and multiple add-ons are available. Operating System: OS Independent.
236. DNN
Previously known as DotNetNuke, this content management solution promises high ROI for less effort when building rich interactive websites. Its users include Canon, Time Warner Cable, Texas Instruments and Bank of America. Operating System: Windows
237. DokuWiki
This simple-to-use wiki was designed for developer teams and other small groups. Key features include unlimited revisions, recent changes viewing, section editing, anti-spam capabilities, multiple language support and more. Operating System: OS Independent
238. Drupal
Drupal claims that more than 98,000 developers are actively contributing to this extremely popular content management system. It counts Microsoft, Zend, Fastly and New Relic among its supporters, and it has a marketplace that features hundreds of companies which offer related products and services. Operating System: OS Independent
If you love scrapbooking, you might also love setting up a family Web site. This app makes it easy to create a private site for sharing photos, calendars, recipes and keeping in touch with family members. Operating System: OS Independent
240. FOSWiki
A split from the TWiki project, FOSWiki distinguishes itself with support of embedded macros to enhance content and allow end-users to create their own applications. The Web site includes considerable support for new users, as well as a number of extensions to the basic application. Operating System: OS Independent
241. Fraym
Launched in 2014, Fraym promises "a new experience for creating and editing websites" and includes features like multi-language support, SEO, integrated caching, themes and drag and drop editing. Operating System: Windows, Linux, OS X.
242. Get Simple
Designed for smaller websites, Get Simple's claim to fame is its extreme ease of use. It boasts excellent security, an intuitive interface, customization capabilities, integrated site backups and more. Operating System: Linux.
243. Hippo CMS
Hippo was the only Java-based open source CMS in Gartner's Magic Quadrant for 2015. For marketers, it offers the ability to measure "which content matters to their audiences and deliver optimal and personalized digital experiences based on this insight." It comes in open source and enterprise editions as well as the Hippo OnDemand platform as a service. Operating System: OS Independent.
244. Joomla
Joomla provides the platform for millions of websites, and it has been downloaded more than 50 million times. Among its many users are companies like eBay, Barnes & Noble, MTV and Peugeot. Operating System: OS Independent
245. MediaWiki
Best known as the software Wikipedia uses, MediaWiki also powers sites for Baidu, Vistaprint, Novell, Intel and NASA. It's a good option for creating editable web pages, and many organizations use it for their internal knowledgebases. Operating System: Windows, Linux/Unix, OS X
246. Mezzanine
Built using the Django framework, Mezzanine offers features like an intuitive interface, scheduled publishing, WYSIWYG or in-line page editing, SEO features, ecommerce, dashboard widgets, and a blog engine. Visit the live demo on the website to see it in action. Operating System: OS Independent.
247. MindTouch
This project allows enterprises to set up self-service and knowledge-base websites where their customers can quickly find information they need. The cloud-based version is now the primary version of the software, but you can still download the open source MindTouch Core from SourceForge. Operating System: Windows, Linux.
248. Okatea
Modular, PHP-based Okatea describes itself as "a compromise between simplicity and flexibility." It boasts a modular architecture which allows users to add features for news, contact forms, etc. Operating System: OS Independent.
249. Orchard
This ASP.NET-based CMS is modular and highly extensible, making it easy to add blogs, photos and much more. The project has several international communities, and Microsoft staffers are involved in the project. Operating System: Windows.
250. Plone
Calling itself "the ultimate enterprise CMS," Plone offers integration with many other enterprise tools including Salesforce and other CRM solutions, Oracle, continuous integration tools, and many Web services. Paid support and other services are available through third-party providers. Operating System: Windows, Linux, OS X
251. Pimcore
This award-winning CMS claims to be "the industry’s first integrated open-source e-commerce & product information management platform for delivering rich and compelling e-commerce (B2C/B2B) experiences across all available channels." Paid support, training and add-ons can be purchased through the site. Operating System: Linux, Unix
252. SEOToaster
This solution claims to be "the most advanced SEO CMS and ecommerce website builder." It offers hub and spoke marketing technology that allows users to manage localized websites from a centralized interface. Operating System: OS Independent
Created by developers in New Zealand, SilverStripe is both an open source CMS and a development firm that provides a variety of related services. SwipeStripe adds ecommerce capabilities to SilverStripe sites. Operating System: OS Independent
254. TikiWiki
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TikiWiki calls itself "Groupware" because it offers features like blogs, forums, an image gallery, map server, bug tracker and feed reader to standard wiki capabilities. The software is completely open source, but support, consulting, hosting and other services are available through third-party partners listed on the site. Operating System: OS Independent
255. TWiki
As a structured wiki, TWiki combines the benefits of a wiki with the benefits of a database. It can be used for project management, document management, as a knowledge base, or to collaborate on virtually any type of content for intranets or the Internet. Operating System: OS Independent.
256. TYPO3
Installed more than 500,000 times, TYPO3 is a widely used enterprise CMS with multisite functionality, excellent scalability, granular permissions, multi-channel content publishing and more. Paid support is available. Operating System: Windows, Linux, Unix
257. WebGUI
Used by thousands of organizations, WebGUI offers capabilities like wikis, online surveys, news feeds, event management, message boards, shopping carts, blogs and more. Several third-party partners offer related services. Operating System: Windows, Linux/Unix, OS X
258. Wolf CMS
This newer CMS prides itself on being lightweight, fast and easy to use. However, note that it is easiest to use if you have some PHP coding skills. Operating System: Windows, Linux
259. XOOPS
Another very popular content management system, XOOPS has won several awards. It boasts a modular architecture, SEO features, excellent security, dynamic editing, email notifications and more. Operating System: OS Independent
260. XWiki
Most wiki software falls a little short when it comes to meeting marketing needs, but XWiki is a very full-featured platform with more advanced capabilities than most other open source projects of its kind. It supports blogging, reporting and the creation of simple Web applications, all of which can be useful to marketing teams. It comes in both a free and a paid enterprise version. Operating System: OS Independent.
261. Yellow
Yellow's claim to fame is its simplicity: "Just files and folders...Not much to learn." It's best for simple blogs and wiki-style websites. Operating System: OS Independent.

Customer Relationship Management (CRM)

262. CiviCRM
Similar to Orange Leap, CiviCRM was particularly designed for advocacy groups, NGOs and non-profit organizations with similar needs. It includes modules for case management, fundraising, event management, membership management, e-mail communications and marketing, and it integrates with both Drupal and Joomla. Operating System: OS Independent
In addition to its features for sales and customer service teams, this Web-based CRM solution includes multiple features for marketers, including lead tracking, targeted email campaigns and survey capabilities. In addition to the open source version, a paid, supported version is also available. Operating System: Windows, Linux, OS X.
264. openCRX
This full-featured CRM solution combines groupware functionality (email, calendar and contacts) with sales force automation, marketing automation, customer service and analytics features. Paid support and custom development are available through partners. Operating System: OS Independent
SplendidCRM calls itself "the clear and obvious choice for companies that prefer Microsoft IIS to Apache and SQL Server to MySQL." It's a Windows-based CRM solution that comes in multiple cloud and on-premise versions. Operating System: Windows.
266. SugarCRM
Used by more than 1.5 million people in 120 countries, SugarCRM is an extremely popular, award-winning open source CRM solution. The website link above is primarily devoted to selling cloud-based subscriptions, but you can find the open source version at SugarCRM.com/download. Operating System: Windows, Linux, OS X.
267. vTiger
Downloaded more than four million times, vTiger comes in both cloud and open source versions. Key features include contact management, opportunity management, email marketing, forecasting, collaboration, workflow automation, reporting and mobile apps. Operating System: Windows, Linux, iOS, Android.
268. X2Contacts
This CRM tool gives marketers the ability to capture Web leads, track Website visits, draft and track emails, and automate and manage campaigns. It comes in a cloud-based version that runs on AWS or in an open source version. Operating System: Windows, Linux, OS X

Databases

269. Blazegraph
Formerly known as "Bigdata," Blazegraph is a highly scalable, high-performance database. It is available under an open source or a commercial license. Operating System: OS Independent.
270. BlinkDB
Still an alpha release, BlinkDB is a "massively parallel, approximate query engine for running interactive SQL queries on large volumes of data." In some tests it performed up to 200 times faster than Hive. Operating System: Windows, Linux
271. Cassandra
Created by Facebook, this NoSQL database counts Apple, CERN, Comcast, eBay, GitHub, GoDaddy, Hulu, Instagram, Intuit, Netflix, Reddit and other tech companies among its users. It supports extremely large data sets and boasts very fast performance and excellent durability and elasticity. Support is available through third parties. Operating System: OS Independent
The team behind this project is working to create a database that is just as hard to kill as a cockroach is—in other words, it's extremely resilient. It also spreads like cockroaches—in other words, it's highly scalable. Operating System: Docker
273. CouchDB
Built for the Web, CouchDB is a NoSQL database that stores data in JSON documents which can be queried via HTTP and manipulated with JavaScript. Cloudant, which is now owned by IBM, offers a professionally supported version of the software, which is used by Samsung, Akamai, Expedia, Microsoft Game Studios and other companies. Operating system: Windows, Linux, OS X, Android
274. Drill
Apache Drill allows users to use SQL queries for non-relational data storage systems. It supports a range of NoSQL and cloud-based data storage systems, including HBase, MongoDB, MapR-DB, HDFS, MapR-FS, Amazon S3, Azure Blob Storage, Google Cloud Storage and Swift. It also allows users to search through multiple datasets stored with different technologies using a single query. In addition, it supports many popular BI tools. Operating System: Windows, Linux, OS X.
275. Firebird
This mature database has been around since 1981. According to its website, it offers "excellent concurrency, high performance, and powerful language support for stored procedures and triggers." Operating System: Windows, Linux, Unix, OS X, Solaris
276. FlockDB
Developed by Twitter, FlockDB is a very fast, very scalable graph database that is good at storing social networking data. While it is still available for download, the open source version of this project has not been updated in quite a while. Operating System: OS Independent.
277. GridGain
Powered by Apache Ignite, GridGrain offers in-memory data fabric for fast processing of big data and a Hadoop Accelerator based on the same technology. It comes in a paid enterprise version and a free community edition, which includes free basic support. Operating System: Windows, Linux, OS X.
278. HBase
Designed for very large tables with billions of rows and millions of columns, HBase is a distributed database that provides random real-time read/write access to big data. It is somewhat similar to Google's Bigtable, but built on top of Hadoop and HDFS. Operating System: OS Independent.
279. Hibari
This Erlang-based project describes itself as "a distributed, ordered key-value store with strong consistency guarantee." It was first developed by Gemini Mobile Technologies and is used by several telecommunications carriers in Europe and Asia. Operating System: OS Independent.
280. Hive
Apache Hive is the data warehouse for the Hadoop ecosystem. It allows users to query and manage big data using HiveQL, a language that is similar to SQL. Operating System: OS Independent.
281. Hustle
Hustle describes itself as "A column-oriented, embarrassingly distributed relational event database." Based on Disco, it's designed to offer extremely fast queries for very large data sets. Operating System: Linux.
282. Hypertable
Used by eBay, Baidu, Groupon, Yelp and many other Internet companies, Hypertable is a Hadoop-compatible big data database that promises fast performance. Commercial support is available. Operating System: Linux, OS X.
283. Impala
Cloudera claims that its SQL-based Impala database is "the leading open source analytic database for Apache Hadoop." It can be downloaded as a standalone product and is also part of Cloudera's commercial big data products. Operating System: Linux, OS X.
284. Infinispan
A Red Hat JBoss project, Java-based Infinispan is a distributed in-memory data grid. It can be used as a cache, as a high-performance NoSQL database, or to add clustering capabilities to frameworks. Operating System: OS Independent.
285. InfluxDB
InfluxDB is a "distributed time series database with no external dependencies." That makes it ideal for collecting data from IoT sensors; in fact, it can track data from tens of thousands of sensors sampling more than once per second. Operating System: Linux, OS X
286. Kexi
Part of the Calligra office productivity suite, Kexi is a visual database application creator similar to Access and Filemaker Pro. Note that it offers better support for Linux than for Windows or OS X. Operating System: Windows, Linux, OS X
287. LucidDB
The LucidDB website claims that this database is "the first and only open-source RDBMS purpose-built entirely for data warehousing and business intelligence." It is written partially in Java and partially in C++ in order to combine high performance with ease of development. Operating System: Windows, Linux, OS X
288. MongoDB
Used by Foursquare, Forbes, Pebble, Adobe, LinkedIn, eHarmony and others, MongoDB is a NoSQL database that claims to be "optimized for mission-critical deployments." Paid professional and enterprise versions are available. Operating system: Windows, Linux, OS X, Solaris
289. MySQL
Beloved by Web companies like YouTube, PayPal, Google, Facebook, Twitter, eBay, LinkedIn, Uber and Amazon, MySQL calls itself "the world's most popular open source database." It comes in multiple paid version as well as the free community version, and the latest update claims to be three times faster than its predecessor. Operating System: Windows, Linux, Unix, OS X
290. Neo4j
The self-proclaimed "world's leading graph database," Neo4J is used for fraud detection, recommendation engines, social networking, master data management and more. It users include eBay, Walmart, Cisco, HP, Accenture, CrunchBase, eHarmony, Care.com and many other organizations. Operating System: Windows, Linux
291. OrientDB
This multi-model database combines some of the capabilities of a graph database with some of the capabilities of a document database. Paid support, training and consulting are available. Operating system: OS Independent.
292. PostgreSQL
PostgreSQL calls itself "the world's most advanced open source database" and boasts more than 15 years of development. It has won multiple awards and offers excellent reliability and stability, even in high-volume environments. Operating System: Windows, Linux, OS X
293. Riak
"Full of great stuff," Riak comes in two versions: KV is the distributed NoSQL database, and S2 provides object storage for the cloud. It's available in open source or commercial editions, with add-ons for Spark, Redis and Solr. Operating System: Linux, OS X.
294. Realm
With an impressive roster of users that includes Google, Amazon, Starbucks, eBay, Budweiser, SAP, BC, Intel, Intuit, McDonalds, Walmart and IBM, Realm boasts that hundreds of millions of people rely on its mobile database. iOS, Android and Java versions are available for freel; enterprise versions are available for a fee. Operating System: Windows, Linux, OS X, iOS, Android
295. Redis
Now sponsored by Pivotal, Redis is a key-value cache and store. Paid support is available. Note that while the project doesn't officially support Windows, Microsoft has a Windows fork on GitHub. Operating System: Linux.
Based on MySQL, WebScaleSQL is a collaboration among Facebook, Google, LinkedIn and Twitter. Their goal is to create a SQL database that can offer the performance, reliability and scalability that these large Web companies need. Operating System: Windows, Linux, OS X.

Data Destruction

297. BleachBit
BleachBit can securely delete files from a standalone system. In addition, it can clean up systems and improve performance by erasing cached files, temporary files, logs and other unnecessary data. Operating System: Windows, Linux
Also known as DBAN, Darik's Boot And Nuke can completely eliminate all data from a hard drive. The open source version is designed for personal use, and a commercial version that can erase RAID arrays is available through Blancco, the project owner. Operating System: OS Independent
299. Eraser
For Windows only, Eraser deletes data from hard drives and overwrites it multiple times so that it cannot be recovered. It can destroy data on an entire drive or wipe out specified files and folders, and it includes a customizable scheduler. Operating System: Windows
300. FileKiller
Another secure deletion tool, FileKiller gives users the option of specifying how many times deleted data is overwritten. It promises fast performance. Operating System: Windows

Data Integration

301. Apatar
Apatar aims to make it easy to move data between on-premise and cloud-based applications, and it includes connectors for Salesforce.com, SugarCRM, and Goldmine CRM. It also comes in an on-demand version that integrates data from Salesforce.com and QuickBooks. Operating System: OS Independent.
302. Clover ETL
The Community Version of this extract, transform, load (ETL) tool can handle "modest" data transformation and ETL jobs. It also comes in paid Designer, Server Standard, Server Corporate and Server Cluster versions. Operating System: OS Independent.
This enterprise-class tool can monitor your data, verify it against internal or external reference data, analyze your data quality, and find and merge duplicate entries. In additional to the free Community version, the company also offers commercially supported Professional and Enterprise editions. Operating System: OS Independent
304. GeoKettle
Based on Kettle/Pentaho Data Integration, GeoKettle incorporates geospatial capabilities from a variety of other open source tools. It is owned by Spatialytics, which offers commercial versions of the tools. Operating System: Windows, Linux, OS X
Designed for analytics, InfoBright is a column-oriented database with a high compression rate. InfoBright.com offers paid, supported products based on the same code. Operating System: Windows, Linux.
306. Karma
Developed at the University of Southern California, Karma can integrate data from databases, spreadsheets, delimited text files, XML, JSON, KML and Web APIs. It aims to be easy to use, and the website includes a number of videos showing its capabilities in action. Operating System: OS Independent.
307. KETL
KETL calls itself "a premier, open source ETL tool" and boasts that its features "successfully compete with major commercial products." Commercial support is available through Kinetic Networks. Operating System: Linux, Unix.
MailArchiva stores enterprise e-mail messages, allowing companies to meet compliance requirements, to search old messages quickly, to monitor content and to save on storage costs. The link above will connect you with the enterprise and ISP versions of the software; for the open source version, see SourceForge. Operating System: Windows, Linux.
Talend is managed by a for-profit company rather than a foundation. As a result, paid support is available. Talend offers a mix of free and paid products. Its free, open source solution is called Talend Open Studio, and it has been downloaded more than 2 million times.
Market research firm Gartner recently named Talend a "Leader" in data integration. The company boasts that it can help enterprises analyze their big data five times faster and at one-fifth the cost compared to competing solutions. Operating System: Windows, Linux, OS X.

Data Loss Prevention

310. MyDLP
This robust DLP solution can "monitor, discover and prevent data leakage on your company network and endpoints." In addition to the free community version, it also comes in a supported enterprise version. Operating System: Windows, Linux, VMware.

Data Mining

311. DataMelt
The successor to jHepWork, DataMelt can do mathematical computation, data mining, statistical analysis and data visualization. It supports Java and related programming languages including Jython, Groovy, JRuby and Beanshell. Operating System: OS Independent.
312. KEEL
Short for "Knowledge Extraction based on Evolutionary Learning," KEEL is a Java-based machine learning tool that provides algorithms for a variety of big data tasks. It's also helpful for assessing the effectiveness of algorithms for regression, classification, clustering, pattern mining and similar tasks. Operating System: OS Independent.
313. Mahout
An Apache Foundation project, Mahout is an open source machine learning framework. According to its website, it offers three major features: a programming environment for building scalable algorithms, premade algorithms for tools like Spark and H2O, and a vector-math experimentation environment called Samsara. Companies using Mahout include Adobe, Accenture, Foursquare, Intel, LinkedIn, Twitter, Yahoo and many others. Professional support is available through third parties listed on the website. Operating System: OS Independent.
314. Orange
Orange believes data mining should be "fruitful and fun," whether you have years of experience or are just getting started in the discipline. It offers visual programming and Python scripting tools for data visualizations and analysis. Operating System: Windows, Linux, OS X.
315. RapidMiner
RapidMiner claims to be the "#1 open source data science platform," and Gartner named it a leader in its Magic Quadrant report for advanced analytics. It enables self-service predictive analytics and promises lightning-fast performance. Its users include BMW, Lufthansa, Domino's Pizza, Sony, Ford, Salesforce, Amnesty International and GE.
The complete RadiMiner Platform includes three separate pieces: RapidMiner Studio, RapidMiner Server and RapidMiner Radoop. All three are available under open source or commercial licenses, and commercial prices depend on the number of users. Operating System: OS Independent.
316. Rattle
Rattle stands for "R Analytical Tool To Learn Easily." It provides a graphical interface for the R programming language, simplifying the processes of creating statistical or visual summaries of data, creating models and performing data transformations. Operating System: Windows, Linux, OS X.
317. SPMF
SPMF now includes 93 algorithms for sequential pattern mining, association rule mining, itemset mining, sequential rule mining and clustering. It can be used on its own or incorporated into other Java-based programs. Operating System: OS Independent.
318. Weka
The Waikato Environment for Knowledge Analysis, or Weka, is a set Java-based machine-learning algorithms for data mining. It can perform data pre-processing, classification, regression, clustering, association rules and visualization. Operating System: Windows, Linux, OS X.

Data Visualization

This project was designed to help produce visualizations of data to aid analysts and other decision makers. It's a JavaScript library that takes a "unified layer based approach to visualization assembly" in order to create rich, powerful graphics. Operating System: OS Independent.
320. D3.js
Short for Data-Driven Documents, D3 makes full use of newer Web standards to help users create interesting graphs and diagrams of their data. It grew out of the older Protovis project, and has been gaining more attention in the last couple of years. Operating System: Windows, Linux, Mac, iPad

De-duplication

321. Opendedup
Opendedup performs inline de-duplication to reduce storage utilization by up to 95 percent. It's available as an appliance for simplified setup and deployment. Operating System: Windows, Linux

Desktop Enhancements

322. Console
For developers and others who like to work from the command line, Console adds capabilities that aren't available through cmd.exe. For example, it allows users to open multiple tabs, change the font and window style, use a text selection tool, and more. Operating System: Windows
323. DropIt
If your file system is a mess, DropIt gives you an easier way to clean it up than using the file copy-and-paste capabilities of Windows Explorer. With this app, you can create an icon on your desktop that sends files to the folder of your choice. Just drag your file to icon and it will move the file where you want it to go. Operating System: Windows
Inspired by the Philip K. Dick novel Do Androids Dream of Electric Sheep? this screensaver connects your system to thousands of others to create abstract designs and patterns. Vote for your favorite patterns to see them reappear more often. Operating System: Windows, Linux, OS X, Android, iOS.
Compatible with both Gnome and KDE, Enlightenment is a fast, modular windows manager. The project also includes a large interface development library, some parts of which are usable on Windows, OS X and other OSes. Operating System: Linux
If you would like a sticky note app for your phone or tablet, check out Floating Stickies. Notes automatically stay on top of apps, and you can dock or resize them easily. Source code available through GitHub. Operating System: Android
327. Florence
If you can't use your hands for some reason, or if you spilled Red Bull on your keyboard and are waiting for it to dry out, Florence can help you keep on typing. This app for the Gnome desktop puts a virtual keyboard on your screen that you can click with your mouse. Operating System: Linux, OS X
328. Fluxbox
Although it's not too flashy, this window manager is lightweight and fast. Key features include tabbing, editable menus, an application dock and more. Operating System: Linux
329. KWin
The default window manager for the KDE Plasma desktop, KWin puts an emphasis on reliability and good looks. The latest version supports compositing, that is, 3D window effects. Operating System: Linux
330. Matrixgl
For those who love the Matrix movies, this screensaver features falling green characters that create images of characters from the The Matrix Reloaded. Operating System: Windows, Linux, OS X
331. PNotes
Leave yourself digital sticky notes on your desktop. Key PNotes features include portability, rich text formatting options, skins, overdue tracking, LAN exchange, social network integration, password protection, encryption, tags and much more. Operating System: Windows (8, 7, Vista)
332. Sticker
Sticker is a Windows 7-compatible electronic post-it note app. Unlike some similar apps, it lets you put notes directly on the desktop as if they were icons. Operating System: Windows
333. VirtuaWin
One of the great features of desktop Linux is the ability to create virtual desktops; VirtuaWin adds the same functionality to Windows. Excellent for multi-tasking, it allows you to group together sets of open windows and switch between them. Operating System: Windows (7, Vista, 2003, XP, 2000, NT, ME, 9x)

Desktop Publishing

334. MiKTeX
Specifically designed to help with the creation of technical publications and books that contain a lot mathematics, MiKTeX brings the TeX/LaTeX solution that is familiar to many Linux users to Windows. Numerous addons extend its capabilities. Operating System: Windows, Linux
335. Scribus
Also suitable for use by professionals, Scribus is an open source page layout/desktop publishing application that can be used to create digital or printed documents. It has been called “one of the most powerful and useful open-source projects out there.” Operating System: Windows, Linux, OS X

Developer Tools

336. 0xbench
0xbench is a full benchmark testing suite for Android devices. In addition to the link above, you can also find the source code on Gitorious. Operating System: Android
337. AML
Short for "Application Markup Language," AML is an XML-based language for building native mobile applications. It's best for creating mobile versions of data-driven Web apps. Operating System: Android
338. Andlytics
Designed to help developers track their app download statistics, Andlytics integrates with the Google Play Developer Console and AdMob. However, note that it does not support Google Apps for Business or multi-connected developer accounts. Operating System: Android
339. AngularJS
Sponsored by Google, this "superheroic" JavaScript framework aims to make it easier to add dynamic content to HTML Web pages. It's embeddable and extensible and works with a wide range of other development tools. Operating System: OS Independent
This IDE supports multiple programming languages, including C, C++, Java, JavaScript, Python and Vala. It includes an interactive debugger, source code editor, version control system, GUI designer, and project management features. Operating System: Linux
341. Apigility
Apigility claims to be "the world's easiest way to create high-quality APIs." It allows users to get started creating their first API in just seconds, and it works with all PHP frameworks and libraries. Operating System: Windows, Linux, OS X
Titanium is part of Appcelerator's full mobile development platform, which requires a subscription. However, you can download the open source version of this JavaScript mobile development framework from Appcelerator.org. Operating System: Windows, Linux, OS X, iOS, Android, BlackBerry
Alloy is the other open source piece of Appcelerator's mobile development platform. It’s an MVC framework based on Titaniaum and Node.js. Operating System: Windows, Linux, OS X, iOS, Android, BlackBerry
344. Appium
Sponsored by Sauce Labs Appium is a testing framework for native, hybrid and mobile web apps. It works with all mobile programming languages and most popular development tools. Operating System: Windows, Linux, OS X, iOS, Android
345. ASP.NET
Microsoft released this free Web framework under an open source license in 2014. It also allows users to host up to 10 ASP.NET websites for free on its Azure cloud computing service. Operating System: Windows, Linux, OS X.
Backbone promises to add structure to your Web applications. It's useful for developing rich client-side applications and promises more freedom than some other JavaScript frameworks. Operating System: OS Independent
347. Bazel
Google released a beta version of this build system this month. It's ideal for environments with a very large shared code repository, a variety of languages and platforms in use, and automated testing and release processes . Operating System: Linux, OS X
348. Bitbeaker
If your organization uses the Bitbucket version control system, Bitbeaker will allow you to browse source code, manage issues, list pull requests, receive notifications and more. Note that it is not a full Git client. Operating System: Android
349. Bootstrap
This Twitter-developed tool proclaims itself to be "the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web." To get an idea of its capabilities, check out the "expo" of websites built with Bootstrap. Operating System: OS Independent
350. Bower
Another Twitter project, Bower manages frameworks, libraries, assets, utilities and other packages for websites. It works with a lot of other popular Web development tools. Operating System: OS Independent
351. Brackets
Founded by Adobe, Brackets describes itself as "a modern, open source text editor that understands web design." It allows users to develop sites and apps for the browser while working in the browser. Operating System: OS Independent
352. Catalyst
This Perl MVC Web framework aims to promote rapid development and clean design. It includes an integrated development server for testing and works with nearly all Web servers. Operating System: Windows, Linux, OS X
353. Chaplin.js
Chaplin.js is an architecture for Backbone.js applications. It was designed to address some of the limitations of Backbone.js and help developers quickly create single-page Web apps. Operating System: Windows, Linux
354. Cinder
Cinder is a popular set of C++ libraries related to graphics, audio, video, networking, image processing and computational geometry. Microsoft Open Technologies has contributed to the project, and it's supported by the Windows Store. Operating System: Windows, Linux, OS X.
355. Cloud9 IDE
Cloud9 is both a cloud-based Ubuntu desktop and a browser-based IDE. You can sign up to use a free or paid version of the service at the link above, or you can set up your own cloud-based IDE using the source code from GitHub. Operating System: OS Independent
356. Cocos2d-x
Used by more than 400,000 developers worldwide, Cocos2d-x makes it easy to build cross-platform 2D games and apps in C++. Features include skeletal animation, sprite sheet animation, effects, textures, transitions, auto-batching, auto-culling and more. Operating System: Windows, Linux, OS X.
This extensible IDE supports C, C++ and Fortran. Features include support for multiple compilers, multi-target projects, syntax highlighting, code completion, smart indent, an integrated debugger and more. Operating System: Windows, Linux, OS X
Award-winning Conditionizr makes it easier to create responsive sites that look great on any device and in any browser. It detects the front end and then serves up the appropriate version of a Website. Operating System: OS Independent
359. Cordova
This tool allows mobile developers to write native apps using HTML, CSS and JavaScript. It has also been incorporated into several other mobile development tools. Operating System: iOS, Android, Blackberry, Windows Phone
360. DebOps
DebOps describes itself as "your Debian-based data center in a box." It's a set of Ansible playbooks designed to make it easier to set up and manage a data center. Operating System: Linux
361. Dev-C++
Dev-C++ supports C and C++, and it includes an integrated debugger, project management, customizable syntax highlighting, code completion, class browser and more. The link above takes you to the original project, but there is also a fork that has been updated more recently on the Dev-C++ Blog. Operating System: Windows
362. Dirigible
Owned by SAP, Dirigible is an integrated development environment as a service (IDEaaS) that promises to help developers "enjoy programming like never before." It's still in beta trials, and you can register to use it for free from the link above. The source code is on GitHub. Operating System: OS Independent
363. Drone
This tool continuously examines code for bugs. It integrates with other development tools and services including GitHub, Bitbucket, Amazon, Heroku and Google App Engine. It's available as a paid hosted service that is free for open source projects. Operating System: Windows, Linux, OS X
364. Eclipse
Best known as a popular integrated development environment (IDE) for Java, the Eclipse project also offers IDEs for C/C++ and PHP, as well as a host of other development tools. Among its key supporters are CA Technologies, Google, IBM, Oracle, Red Hat and SAP. Operating System: OS Independent
365. Emacs
Since the 1970s, generations of developers have used Emacs for writing code. It offers content-sensitive editing, syntax coloring, full Unicode support, customization capabilities and a large library of extensions. Operating System: Windows, Linux, OS X
366. Ember.js
This "framework for creating ambitious Web applications," aims to improve productivity for JavaScript developers. Its website lists Yahoo, Square, Livingsocial, Groupon, Twitch, TED, Netflix, Heroku and Microsoft among its users. Operating System: OS Independent
Now more than a decade old, Evolutility simplifies the creation of database-driven apps and Web apps without writing any code. The website includes a number of sample applications to show you how it works. Operating System: Windows
368. Falcon
Designed to be light, fast and flexible, Falcon is a Python framework for building cloud APIs and web app back-ends. Fairly new, its website proclaims that it has been "Unburdening cloud apps for over 2.16 x 10-2 centuries" (that's a little over two years). Operating System: Windows, Linux, OS X
369. Falcor
Falcor describes itself as "a JavaScript library for efficient data fetching." Created by Netflix, it allows Web apps to get and display data very quickly, improving the end user experience. It is still in developer preview status. Operating System: Windows, Linux, OS X
370. Flight
Twitter created this lightweight, event-drivien JavaScript framework for use on its own Web apps and has open sourced the code for everyone. It maps behavior to DOM nodes. Operating System: OS Independent
Designed for novices, Game Editor aims to help inexperienced developers learn the basics of programming and create games for nearly any platform. It boasts an intuitive interface, event-driving programming, fast design prototyping and input flexibility. Operating System: Windows, Linux, OS X, iOS, others
372. GCC
The "GNU Compiler Collection" offers front ends and libraries for C, C++, Objective-C, Fortran, Java, and Ada. It's probably the most widely used compiler for code that will run on multiple operating systems. Operating System: OS Independent
373. Gestalt
This tool allows developers to include Ruby, Python and XAML code within HTML code. It's goal is to enable the creation of rich Web apps using tools that developers already know. Operating System: OS Independent
374. Glade
Glade lets developers quickly create interfaces for the GTK+ toolkit and the GNOME desktop environment. It saves those interfaces in XML so they can be accessed by applications written in a wide variety of programming languages. Operating System: Windows, Linux, OS X
375. Gradle
Gradle automates many of the tasks associated with building, testing, publishing and deploying applications, and it is very popular with Java, Groovy and Scala developers. Microsoft offers a plug-in for integrating Gradle with Microsoft Team Foundation Server. Operating System: OS Independent
376. Grunt
Grunt is a JavaScript task runner that helps automate repetitive development tasks. Well-known tech companies using it include Adobe, Twitter, Mozilla, Cloudant and WordPress. Operating System: OS Independent
377. Gumbo
Released by Google, Gumbo is a C implementation of the HTML5. It's meant to provide the foundation for a variety of other development tools. Operating System: Linux
378. Hammer.js
Adding touch gestures to your mobile app? Hammer.js makes it easy. It supports most common single- and multitouch gestures, and you can also customize it to add your own gestures. Operating System: OS Independent
379. Hibernate
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Part of the JBoss Enterprise Middleware Suite, Hibernate provides object/relational persistence for Java and .NET. It also includes the ability to write queries in SQL or the Hibernate version of SQL (HQL). Operating System: OS Independent
380. Hygieia
Created by financial services heavyweight Capital One, Hygieia (pronounced "hi-gee-ya") is a DevOps dashboard that allows users to see the status of their entire delivery pipeline at a glance. The code, screenshots and a video explaining the tool are available on Capital One's Git Hub pages. Operating System: OS Independent
Calling itself the "most intelligent Java IDE, IntelliJ IDEA supports enterprise, mobile and Web development. It comes in a free community edition or a paid ultimate edition. Operating System: Windows, Linux, OS X
Also known as TBB, Threaded Building Blocks is a tool that helps developers write C++ programs that take advantage of the processing power in multi-core systems. A commercially supported version is available. Operating System: Windows, Linux, OS X
383. Ionic
For developers building hybrid mobile aps, Ionic is an open source front-end SDK designed to help create beautiful apps with Web technologies. Extremely popular, this tool has more than 40,300 followers on GitHub. Operating System: OS Independent
384. IPFaces
A product of Edhouse, iPFaces excels at the creation of form-heavy mobile apps using Web development technologies. It's available in both a free community version and a paid commercial version. Operating System: OS Independent for the developer; creates apps for iOS, Android, BlackBerry, others
385. Javadoc
Javadoc uses the comments you embed in your Java code to create an HTML documentation file. By default it describes the public and protected classes, nested classes (but not anonymous inner classes), interfaces, constructors, methods and fields. It's included in Oracle's Java developer kits. Operating System: Windows, Linux, OS X
386. Jenkins
The "leading open source automation server," Jenkins was forked from Hudson and offers many of the same capabilities. It boasts easy installation and configuration, hundreds of plugins, extensibility and a distributed architecture that allows it to speed the process of testing. It has a very active user community with lots of scheduled events that offer opportunities to learn more about the software. There is also plenty of documentation on the website, including a blog that is updated regularly. Operating System: Windows, Linux, OS X
387. JHipster
JHipster brings together many popular development tools into one package. It uses Spring Boot for the server side, AngularJS and Bootstrap for the front-end, and Yeoman, Bower, Grunt and Maven to help with the workflow. Operating System: OS Independent
388. jQuery
This popular JavaScript library simplifies HTML document manipulation, event handling, animation and Ajax and claims to have "changed the way that millions of people write JavaScript." Its sponsors include WordPress, Famo.us, and IBM. Operating System: OS Independent
JQuery Mobile promise to allow mobile developers to write one app that will run on all mobile pltforms. It's based on HTML5 and is one of the more popular open source mobile development frameworks. Operating System: OS Independent
390. jQT
This plugin for Zepto.js and jQuery aims to mke it easy for developers to create cross-platform apps. Key features include easy installation, customization capabilities, theme support, callback functions, Sass-based stylesheets and more. Operating System: iOS, Android
391. Jsonnet
As you might guess from the name, this configuration language was designed to simplify the process of writing JSON. Developers can use it to help organize JSON data. Operating System: Windows, Linux, OS X
392. KDevelop
KDE's development environment boasts full-featured support for C/C++ and some other languages. Although it was developed for the KDE Linux desktop, it also runs on GNOME and other desktops, as well as Windows and Unix. Operating System: Windows, Linux, OS X
393. KinomaJS
The Kinoma platform encompasses both hardware and software tools for prototying IoT devices and applications. KinomaJS, its JavaScript-based application framework, is available under an open source license. Operating System: Windows, Linux, OS X
394. Kurogo
Used by organizations like Massachusetts General Hospital, Harvard University, Brown University, the University of Wisconsin and many others, Kurogo describes itself as "open-source Mobile Optimized Middleware™ for developing content-rich mobile websites and iOS and Android apps." The name comes from a Japanese word for stagehands who are invisible to the audience but allow the stars of the show to shine. Operating System: Windows, Linux, iOS, Android
395. LoopBack
This Node.js framework aims to make it easy to create REST APIs and connect to backend data stores. Noteworthy users include GoDaddy, The U.S. Department of Energy and Symantec. Operating System: Windows, Linux, OS X, Android, iOS
Based on Java and the Apache Cassandra NoSQL database, Mainspring describes itself as "an open source application framework for building machine to machine (M2M) applications such as remote monitoring, fleet management or smart grid." Features include flexible device modeling, device configuration, communication between devices and applications, data validation and normalization, long-term data storage and data retrieval. Operating System: Windows, Linux, OS X
Want to build your own alternative to YouTube, Flickr or SoundCloud? MediaGoblin makes it easy to set up a media publishing site. Operating System: Linux
398. Meteor
Meteor promises to help users "build apps that are a delight to use, faster than you ever thought possible." It claims that its reactive programming model allows Web and mobile developers to accomplish in 10 lines what would otherwise take 1,000. Operating System: OS Independent
399. MinGW
"Minimalist GNU for Windows" ports the GCC compilers and GNU Binutils for Windows. It allows you to use GNU tools to build Windows apps from Windows or Linux systems. Operating System: Windows, Linux
400. Mojito
This Yahoo Cocktail is a MVC JavaScript application framework that can run on client browsers and in Node.js on servers. It includes tools for local development, internationalization, localization, integrated unit testing and device-specific presentation. Operating System: Linux
401. Mono
Mono describes itself as "an open source implementation of Microsoft's .NET Framework based on the ECMA standards for C# and the Common Language Runtime." It enables rapid development of cross-platform applications. Previously sponsored by Novell, it's now owned by Xamarin. Operating System: Windows, Linux, OS X, iOS, Android
Designed for C# and Visual Basic.NET, MonoDevelop helps Windows developers create multi-platform applications. Key features include advanced text editing, an integrated debugger, GTK# Visual Designer, unit testing, localization and more. Operating System: Windows, Linux, OS X
403. .NET
In 2014, Microsoft announced plans to open source its .NET development framework. The .NET Foundation website offers all the .NET tools the company has open sourced so far, including the Roslyn compiler. You can also find the .NET tools on GitHub. Operating System: Windows
404. Neovim
Generations of Emacs-hating developers have sworn by Vim as the only text editor they'll use for coding. Neovim is a new take on the classic tool with more powerful plugins, better GUI architecture and improved embedding support. Operating System: Windows, Linux, OS X
405. NetBeans
Useful for creating desktop, mobile or Web apps, NetBeans supports Java, HTML5, PHP, C/C++ and several other programming languages. It has won several awards and boasts a large library of plug-ins. Operating System: Windows, Linux, OS X
This popular PHP framework promises to make Web developers' work easier. It boasts "perfect" security, integrated debugging tools, fast performance, an easy learning curve, a large community and more. Operating System: Windows, Linux
407. Node.js
Node.js's claim to fame is that it allows developers to write server-side applications using JavaScript. Formerly controlled by Joyent, development is now overseen by the Node.js Foundation. Its users include IBM, Microsoft, Yahoo, SAP, LinkedIn, PayPal and Netflix. Operating System: Windows, Linux, OS X
408. Node-RED
This "visual tool for wiring the Internet of Things" simplifies the process of connect IoT devices with APIs and online services. It is built on Node.js and includes a browser-based flow editor. Operating System: Windows, Linux, OS X
409. Nuclide
Created by Facebook, Nuclide is an integrated development environment that supports both mobile and Web development. It is built on top of Atom, and it can integrate with Flow, Hack and Mercurial. Operating System: Windows, Linux, OS X
410. NuGet
This extension for Microsoft's Visual Studio makes it easy to install and update open source libraries for the .NET platform. And the NuGet Gallery makies it easy to find those open source libraries. Operating System: Windows
Just last month, Microsoft made this tool generally available on GitHub. It's a front-end fabric that allows developers to build Office-like Web apps and add-ins. Operating System: Windows
412. OneOps
Released by Walmart Labs as an open source tool earlier this year, OneOps is the newest open source DevOps tool on this list. It brings together cloud management and application lifecycle management capabilities with the goal of helping DevOps teams write and launch applications more quickly. It also makes it easy to switch among multiple cloud providers, helping prevent vendor lock-in and providing greater flexibility. It offers high availability, self-healing and auto-replace capabilities, automatic scaling and integration with many other continuous delivery and automation tools, as well as support for all the major public cloud services.
413. OpenBD
OpenBD bills itself as "the world's first truly open source and free GPL Java CFML runtime." It allows Web developers to create apps using the Cold Fusion Markup Language (CFML) without purchasing ColdFusion. Operating System: Windows, Linux
414. OpenMEAP
OpenMEAP is a rapid application development (RAD) platform for creating mobile apps. It allows non-programmers to build and deploy cross-platform apps. Operating System: Android, iOS, Windows, BlackBerry
This helpful Android app aggregates a bunch of open source libraries, saving developers a lot of research time. It's useful for creating Android apps from an Android device. Operating System: Android
416. OWASP
The “Open Web Application Security Project” includes a number of documents, applications, and tools for developers concerned about app security. Key projects include WebGoat, ESAPI Security Library for Java, and numerous standards and guides. Operating System: OS Independent
417. Parse SDKs
Owned by Facebook, Parse is a mobile backend as a service that simplifies the process of creating mobile apps. Earlier this year, it open sourced three of its SDKs, and it promised to release the rest in the future. Operating System: iOS, OS X, Android
418. Phaser
"Fast, free and fun," Phaser is an HTML5 framework for building desktop and mobile games based on Canvas and WebGL. Noteworthy features include three physics engines, an easy-to-use preloader, simplified animation, a powerful camera, device scaling and more. Operating System: Windows, Linux, OS X, Android, iOS
419. PhoneGap
Apache Cordova is an open source framework that allows developers to create mobile apps using web technologies like HTML, CSS and JavaScript. PhoneGap is the most popular distribution of Cordova. Tech companies that use one or the other include Wikipedia, Facebook, Salesforce, IBM, Microsoft, Adobe and BlackBerry. Operating System: Window, Linux, OS X
Like Javadoc, phpDocumentor turns code comments into readable documentation for users, only in this case for the PHP language instead of for Java. It's very fast and includes a variety of templates. Operating System: OS Independent
421. phpMyAdmin
Written in PHP, this utility handles the administration of MySQL over the Web. phpMyAdmin performs many database administration tasks like running SQL statements, adding and dropping databases, and adding, editing or deleting tables or fields. Operating System: OS Independent
422. Prototype
This JavaScript framework wants to help developers build "ambitious Web user interfaces." It aims to simplify development and help developers find more elegant ways around Ajax and the DOM. Operating System: OS Independent
423. Qt
This framework aims to help developers "create connected devices, UIs and applications that run anywhere on any device, on any operating system at any time." According to its website, it is the "leading independent technology for cross-platform development," and it is used by five of the top ten companies on the Fortune 500. Operating System: Windows, OS X, Linux
Created by Facebook, React Native is a framework for building native mobile applications using JavaScript and the React JavaScript library (which was also created by Facebook). Other users include Discovery and CBS Sports. Operating System: OS X
425. Rhodes
Inspired by Ruby on Rails, Rhodes is a framework for creating smartphone apps tht interact with transactional enteprirse application back-ends. A commercially supported version is available through RhoMobile. Operating System: Windows, Linux, OS X, iPhone, Android, BlackBerry, Windows Phone
Extremely popular with developers, this Web development framework claims to be "optimized for programmer happiness and sustainable productivity." It is used by companies like Basecamp, Twitter, Shopify and GitHub. Operating System: Windows, Linux, OS X
Sencha Touch describes itself as "the leading cross-platform mobile Web application framework based on HTML5 and JavaScript for creating universal mobile apps." It is available under both open source and commercial licenses, and according to the website, it is used by 60 percent of the Fortune 100. Operating System: OS independent
428. Sgit
This app is both a Git client and a text editor that runs on Android phones and tablets. It allows developers to pull from and push to remote repositories, checkout branches, commit and push changed files, merge branches and more. Operating System: Android
SharpDevelop (also written #develop) is a free IDE for the .NET platform. It supports Microsoft languages like C#, VB.NET, Boo, IronPython, IronRuby and F#. Operating System: Windows
If you want to connect a Google Spreadsheet to a Web app, SheetSee.js does the trick. It also enables the Web app to display the data as a table, map or chart. Operating System: OS Independent
431. Sidekiq
Sidekiq promises "simple, efficient background processing for Ruby." It speeds up Web applications and makes them more scalable. Operating System: OS Independent
Released in August, this Netflix tool helps Web developers avoid cross-site scripting (XSS) vulnerabilities. It allows developers and security staff to capture, manage and track XSS issues. Operating System: OS Independent
433. soapUI
Calling itself the "Swiss Army knife of testing," SoapUI makes it possible to do functional, regression, compliance, and load tests of applications for nearly any platform. A paid commercial version and training are also available. Operating System: OS Independent
434. SonarQube
This code quality management platform covers architecture and design, duplications, unit tests, complexity, potential bugs, coding rules and comments. It supports more than twenty programming languages include Java, C/C++, C#, JavaScript, Objective-C, PHP, and Python. Operating System: OS Independent.
435. Terraform
Terraform describes itself as "a tool for building, changing, and versioning infrastructure safely and efficiently." With it, DevOps teams can easily set up and replicate infrastructure configurations. Operating System: Windows, Linux, OS X
436. Textmate
Exclusively for developers who work on Macs, Textmate is a text editor that offers many more advanced features you would usually find in a full-fledged IDE. The project website states, "Created by a closet UNIX geek who was lured to the Mac platform by its ease of use and elegance, TextMate has been referred to as the culmination of Emacs and OS X." Operating System: OS X
Text Warrior is a text editor that runs on Android devices and includes syntax highlighting for C, C++, C#, Java, JavaScript, Objective-C, PHP, Python and Ruby. It claims to be "the only Android text editor that supports direct touch and drag selection of text and other custom behaviors." Operating System: Android
438. THyM
Managed by the Eclipse Foundation, The Hybrid Mobile project, or THyM, allows developers to build cross-platform apps using the Eclipse IDE. It also integrates with Apache Cordova and related tools. Operating System: OS Independent
Sponsored by Microsoft, this project makes it easy to create apps from a smartphone or tablet. Its touch-friendly editor requires very little typing. Operating System: Windows, Linux, OS X, iOS, Android
440. Ultimate++
Designed for C++ development, Utlimate++, or U++, boasts that it can makes rebuilds four times faster than its competitors. It includes a wealth of tools that speed programming include documentation generators, visual designers and a code analyzer. Operating System: Windows, Linux
441. Vagrant
Owned by DevOps tool vendor HashiCorp, Vagrant aims to make it easy to set up development environments that are lightweight, portable and reproducible. It's a command-line utility for managing virtual machines. Its users include the BBC, Expedia, Yammer, Mozilla, Nokia and others. It integrates with Chef, Puppet, VMware, Amazon Web Services and many other DevOps tools and cloud services. Paid VMware plug-ins are available through partners, and HashiCorp offers related paid tools for managing DevOps environments. Operating System: Windows, Linux, OS X.
442. Vim Touch
As you might guess from the name, Vim Touch ports the Vim text editor for Android. It includes all the standard Vim features plus support for multi-touch gestures. Operating System: OS Independent
443. Wakanda
This JavaScript framework wants to "bridge the gap between business and IT" by making it easy to build and deploy applications. It comes in both free and paid versions. Operating System: Windows, Linux, OS X
444. wxWidgets
This cross-platform development toolkit enables programmers to write applications in C++, Python, Perl, and C#/.NET that work on several different operating systems. In addition to an easy-to-use GUI, wxWidgets offers online help, streams, clipboard and drag and drop, multithreading, database support, HTML viewing and printing, and many other features. Operating System: Windows, Linux/Unix, OS X
445. YAPF
Short for "Yet Another Python Formatter," YAPF reformats Python code so that it conforms to the style guide and looks good. It's a Google-owned project. Operating System: OS Independent
Zend claims to be "the most popular framework for modern, high-performing PHP applications." It describes itself as modular, secure, extensible, high-performing and enterprise-ready. Operating System: Windows, Linux, OS X
447. ZK
Companies like Sony, Sun, IBM, Adobe, eBay, Fujitsu, DreamWorks and Unisys use this Java Web framework to build Web and mobile apps. Paid support and related tools are available. Operating System: OS Independent
Foundation doesn't claim to be the most popular or the best, but it does call itself "the most advanced responsive front-end framework in the world." The website adds that it is faster for both developers and end users. Paid support and services are available. Operating System: OS Independent

Diet/Exercise/Fitness

A few years ago, several publications covered a 7-minute workout that includes 12 high-intensity exercises. This app explains how to do all the exercises. Operating System: Android.
Angel claims to be the "only wearable designed as an open platform for mobile health." Devices sell for $99, and they can track heart rate, skin temperature, steps, sleep, calories, acceleration and orientation. Operating System: Windows, Linux.
Heavy on the calisthenics, this app includes videos of common exercises and lets you log your sets, weight and time for workouts. If you'd like to make a donation to support development, buy the pro version, which is the same as the free version. Operating System: Android.
This GitHub repository ports the Android Bodyweight Fitness app to iOS. Includes videos and a timer. Operating System: iOS.
453. Cronometer
One of the more polished open source diet tracking apps available, Cronometer helps track calorie reduced diets plus exercise and biometrics. It comes in mobile, Web and downloadable versions. Operating System: Windows, Linux, OS X, Android, iOS, Web
This app logs your daily food intake and calculates calorie and nutrient information. It automatically sends alerts when you eat more than usual. Operating System: Windows.
With this tool you can set up a Web app to track your daily caloric intake and store the data in a MySQL database. It includes graphing capabilities and automatically calculates your BMI. Operating System: OS Independent
This Android app can track and graph weight, BMI, body fat and waist size. It allows users to set goals and can express values in kilograms or pounds. Operating System: Android.
457. DXWorkout
Created for bodybuilders, this simple app tracks daily workouts. It includes charting and a customizable exercise list. Operating System: Android, iOS, Windows Phone, Web.
458. Exceer
Exceer was "designed to support your bodyweight training workout by enforcing your progressions and form." It is part of the F-Droid repository of open source Android apps. Operating System: Android.
459. Fitloop
Fitloop.co is a social website for bodyweight fitness training. The Fitloop Github project (linked above) provides code for setting up your own social-enabled fitness website. Operating System: OS Independent.
Created for cyclists and triathletes, Golden Cheetah imports ride data from devices and allows users to perform various types of analysis. Tools include ride plots, stress plots, pedal force/velocity, histogram, track trends and more. Operating System: Windows, Linux, OS X.
461. Gtrainer
Whether you are a beginner or an expert, a road biker or a mountain biker, this sports diary can help you keep track of your rides. Also includes daily tips and reports. Operating System: Linux.
462. iDiet
This diet tracking software supports a variety of meal plans, including Atkins, the Zone, Weight Watchers and Body for Life. It includes a simple, intuitive interface. Operating System: Windows, Linux, OS X.
463. JDiveLog
This Java-based app records information about SCUBA dives. It can transfer information from dive computers, and it can manage photos you take on your trips. Operating System: Windows.
As the name suggests, this app does just one thing—track your weight. It integrates with Google Fit, and the source code is on GitHub. Operating System: Android.
465. Moyeu
If you live in Boston (or even if you're just visiting), this app will help you connect with the city's Hubway bike sharing system. It provides information about stations and nearby attractions and facilities. Operating System: OS Independent.
466. NUT
NUT analyzes what you eat and tells you how many nutrients you are consuming. It includes access to the full USDA nutrition database and has meal-planning capabilities. Operating System: Windows, Linux, OS X.
Unlike most map apps, this one doesn't navigate from point A to point B, it just measures distances. That makes it helpful for planning runs of a certain distance. Operating System: Android.
468. OpenBikes
This web application helps users find bike sharing services around the world. The source code for the project is on GitHub, and it was built by students using open data sources and open source tools. Operating System: OS Independent.
This project is a lot like OpenBikes, but it's a native Android app rather than a web app. It includes data for shared bikes in 400 cities in 40 countries. Operating System: Android.
470. Open Fit
If you have a Samsung Gear Fit but don't have a Samsung phone, this app will allow you to control your Fit with the phone you have. It includes features like text/phone call/e-mail notification, weather notification, pedometer data and more. Operating System: Android.
This mobile app can provide maps and other data about trails stored in the Open Trail System Specification data format. It can be configured for offline use in areas that don't have network connections. Operating System: iOS.
This app tracks your strength and cardio training. It includes more than 90 searchable exercises and more than 180 images that show you how to perform the exercises correctly. Operating System: Android.
473. OpenYou
OpenYou is a website that provides information and news about open source projects related to health-tracking devices. It also provides the links to the source code for several tools that allow users to access firmware or download data from fitness wearables. Operating System: OS Independent.
474. Pedometer
The name says it all—this is a free, lightweight app for tracking your steps. It works best with devices that have a hardware-based step-sensor, which allows it to have a minimal impact on battery life. Operating System: Android.
475. PhpMySport
This content management system (CMS) simplifies the process of setting up a website for sports clubs and leagues. It supports football, soccer, basketball, handball, cricket, volleyball, hockey and polo, and it can be adapted for other sports. Operating System: OS Independent.
This app uses your device's proximity sensor to log how many pushups you have done and how long you have rested. It keeps a workout log so that you can see your progress over time. Operating System: Android.
477. Pytrainer
This desktop app can import GPS data to keep track of your running or biking sessions. It's a good option for those with Garmin fitness tracking devises. Operating System: Linux.
Athletes who play squash, badminton or racquetball often use a training exercise called "Ghosting" to help them practice moving to different sections of the court. Ordinarily, you need a coach to keep the movement random, but this app plays the role of the coach for you. Operating System: Android.
479. RunnerUp
For runners, walker and bikers, this app tracks where you travel on your workout, keeping track of pace, distance and time. It also supports many common heart rate monitors, and it allows you to share workout information with friends. Operating System: Android.
480. SportChef
First released in January 2016, this brand new project aims to aid in setting up and managing sports competitions. It has a web-based user interface with a Java backend. Operating System: OS Independent.
481. < href="http://sportstacticsbd.sourceforge.net="">Sports Tactics Board
Designed to help coaches explain plays to their teams, this tool is like a digital magnetic board or chalkboard that displays the playing field or court. It currently supports soccer/football, ice hockey, futsal, floorball, volleyball and American football. Operating System: Windows.
Java-based SportsTracker can monitor data for a wide variety of activities like biking, swimming, running or tennis. It can import data from a wide variety of heart monitors, and it stores data as XML files. Operating System: Windows, Linux, OS X.
483. SWJournal
Extremely minimalistic, this app tracks which exercise you have done and how many sets you have completed. It promises "maximal informativity with minimum of interactions." Operating System: Android.
484. Tapiriik
If you use more than one fitness device or mobile fitness app, Tapiriik can sync your data. It supports Runkeeper, Garmin, SportTracks, EndoMondo, Dropbox, Motivato and more. Operating System: OS Independent
Part of the Code for America project, this Web app helps people find information about trail systems in their area for running, hiking, cycling, etc. The production version is at Trailsy.herokuapp.com. Operating System: OS Independent.
486. Trackly
This web app tracks your weight over time and allows users to enter comments. Source code is on GitHub. Operating System: OS Independent.
Turtle Sport retrieves data from GPS and fitness tracking devices so that you can see it on your desktop or laptop. It creates reports, makes maps, searches for races and much more. Operating System: Windows, Linux, OS X
Designed for personal trainers and fitness enthusiasts, this app tracks your food intake, your workouts and your measurements. It has a bare-bones interface, but it gets the job done. Operating System: Windows.
As the name suggests, this app helps you figure out how many warm-up reps you should do to work up to a given weight. It also explains how to load the weights for a standard Olympic bar. Operating System: Windows.
490. WarmupReps
This Web app calculates warmup sets for various weightlifting programs, including Starting Strength, 5x5 and Max Single. It's mobile-friendly, and the source code is on GitHub. Operating System: OS Independent.
This WordPress plug-in makes it easy for sports leagues and clubs to setup websites that include stats and game results. A variety of themes are available. Operating System: OS Independent.
Another Android weight tracking app, Weight Logger imports data from body composition scales and can export it to Garmin devices. It tracks weight, body fat, body water and muscle mass. Operating System: Android.
493. Wger
Similar to MyFitnessPal, Wger tracks both nutrition and workouts. It runs as a free Web app that is mobile-friendly. Operating System: OS Independent.
494. WorkoutLog
Like SWJournal, this fitness tracker takes a minimalist approach. It tracks which exercises you have done and reminds you of your previous results when you do the same exercise again. Operating System: Android.
Designed for indoor cycling or rowing, this Java-based app tells you how long to workout and what your heartrate should be throughout your exercise session. You can create your own workouts, and you can use it with a projector for group classes. Operating System: OS Independent.
496. Workrave
If you sit at a computer all day, you are at risk for Repetitive Strain Injury. This app helps prevent these types of injuries by reminding you to take breaks and enforcing daily time limits. Operating System: Windows, Linux.
497. Ventoo
This app turns your Pebble smartwatch into a cycling computer. It automatically starts when it senses you are riding a bike, and it tracks your route, speed, distance and altitude. Operating System: Android.
498. Zuluru
Originally created to manage an Ultimate Frisbee league, this app can now help baseball, basketball, dodgeball, hockey, rugby or soccer leagues set up their own websites. Development help and hosting is available through Zuluru.net. Operating System: OS Independent.

Disaster Preparedness

Created in Indonesia and Australia, this app helps scientists and communities explore the potential impact of natural disasters in a region. To use it, you'll need Quantum GIS, an open source geographic information system. Operating System: OS Independent

Document Management Systems (DMS)

500. LogicalDOC
Designed for both large and small organizations, LogicalDOC promises intuitive and accessible document management that can help users achieve a paperless office. The community version is free, or users can pay for the professional or cloud versions. Operating System: OS Independent.
501. OpenDocMan
Designed to comply with ISO 17025 and OIE standards for document management, OpenDocMan offers features like easy setup, robust user management, change tracking, search, robust security and support for multiple languages. In addition to the free download, it's also available as a hosted service, and cloud-based backup can be purchased for an additional fee. Operating System: OS Independent.
502. OpenKM
Standards-based OpenKM offers "full document management capabilities including version control and file history, metadata, scanning, workflow, search, and more." It comes in a free community version, paid professional version or paid cloud version. All of the editions run in a web browser. Operating System: OS Independent.
503. Xinco DMS
Short for "eXtensible INformation COre," Xinco offers Web-based management of files, documents, contacts, URLs and more. Features include ACLs, version control and full text search. Operating System: Windows, Linux, OS X.

Ecommerce

504. AbanteCart
AbanteCart humbly proclaims itself to be the "most powerful eCommerce platform to sell anything." Key features for marketing teams include responsive templates, audio/video support, customer reviews, customer wishlists, coupons, an affiliate system, localization, SEO, smart search, storefront banners and more. Operating System: Windows, Linux.
505. AFCommerce
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AFCommerce is a simplified shopping cart and website builder that promises new users can master it in just two to three hours. It has been used to create more than 250,000 websites. Operating System: Windows, Linux.
506. Avactis
This PHP-based shopping cart features mobile support, easy Facebook integration and a visual CSS editor. Paid support and hosting are available. Operating System: Windows, Linux.
One of the more popular open source ecommerce solutions, Broadleaf is modular and Java-based. Key features include promotions, personalized offers and discounts, personalized ad targeting, promo code support, built-in content editing, multi-currency support, product information management, smart search and browse, SEO management and more. Paid services are available. Operating System: Windows, Linux, OS X.
508. Cartridge
Built on the Django framework, Cartridge is a clean, simple shopping cart that focuses on providing the most essential features. It integrates with the Mezzanine content management platform and is highly customizable. Operating System: Windows, Linux, OS X.
509. ColorShop
Based on WooCommerce and Jigoshop, ColorShop offers an advanced filtering and ordering system, photographs, reviews and much more. The developers behind the project also offer paid themes. Operating System: OS Independent
510. CubeCart
Used by tens of thousands of merchants, CubeCart bosts features like unlimited products, built-in statistics, gift certificates, coupons, social media plug-ins, customizable SEO features, Google Analytics support and more. Paid technical support is available, and hosting and other services are available through partners. Operating System: Linux.
511. Digistore
Based on osCommerce, Digistore features a WYSIWYG editor, advanced templating, in-store advertising, express checkout, customer reviews, multilingual and multicurrency support, reporting and more. Paid customization services are available. Operating System: Windows, Linux, OS X.
Designed for users with some development expertise, Drupal Commerce is a framework useful for building online shopping sites of all sizes. It includes a payment method API, tax calculation, dynamic product display, discount pricing rules and more. Operating System: Windows, Linux, OS X
This ecommerce extension comes with advanced search capabilities, social tools, product comparison and five themes. Paid plugins add more functionality, including export/import, featured products and best-sellers. Operating System: Windows, Linux, OS X
514. eShop
For WordPress users, eShop offers features like optional customer sign-in, downloadable products, basic statistics and sales data, multple shipping options, basic stock control, sales tax and more. It integrates with PayPal and has several companion plug-ins that extend its functionality. Operating System: OS Independent
515. HikaShop
Simple and flexible, HikaShop offers international sales, powerful statistics, responsive layout, marketing tools and much more. For additional features, users can download the paid essential or business versions. Operating System: Windows, Linux, OS X
This plug-in installs with just one click and works with any WordPress theme. It's highly flexible, SEO-friendly, and accepts multiple currencies. Operating System: OS Independent
Interchange is both an ecommerce system and a Perl-based application server. Now two decades old, it’s a mature platform with thousands of users. Operating system: Linux, OS X
Isotope is an ecommerce plug-in for Contao CMS, a Web content management system designed to be accessible to people with disabilities. It's highly flexible and paid support is available for purchase. Operating System: OS Independent
519. JadaSite
Java-based JadaSite offers one-page checkout, support for multiple payment gateways, Microsoft Bing translator, inventory tracking, date-based sale pricing, cross-sell and up-sell features, multi-lingual and multi-currency capabilities, coupon support, item ratings, multiple discounting options, personalization features and more. Paid implementation, consultation and customization are available. Operating System: OS Independent
520. Jigoshop
Also for WordPress, Jigoshop describes itself as "a well-established e-commerce platform that combines broad functionality, easy migration options and professional support packages." Several levels of small business and enterprise support are available, as are paid extensions. Operating System: OS Independent
This ecommerce platform was designed for brick-and-mortar retailers that want to have an online presence. It integrates with Lightspeed's POS solutions. Source code is available at GitHub. Operating System: OS Independent
Used by more than 10,000 stores, Loaded boasts that it is "the most powerful ecommerce software available." Key features include comprehensive catalog and shopping cart, data-driven inventory management, digital downloads, affiliate system, and more. Paid Pro and B2B versions are available. Operating System: Windows, Linux
523. Magento
Magento claims to have powered more Internet Retailer Top 1000 merchants than anyone else for three years in a row and to process more than $50 billion in transactions each year. In addition to the community edition, it comes in enterprise and enterprise cloud editions. Operating System: Windows, Linux, OS X.
524. Mallmold
Built for SMBs, this PHP-based ecommerce solution is easy to maintain and expand. To use it, you will also need MySQL version 5 or later. Operating System: Windows, Linux, OS X
MarketPress combines the functionality of dozens of WordPress plug-ins into one comprehensive ecommerce solution. It also comes in a paid Pro version with additional features. Operating System: OS Independent
This is the only open source ecommerce platform on the list that claims it "makes merchants smarter." The project gathers social analytics data from its users and shares the insights with MerchantTribe members. Several free reports are available for download on the site, and MerchantTribe also offers paid hosting. Operating System: Windows, Linux, OS X
527. MiwoShop
This turnkey shopping cart solution offers unlimited products and categories, reviews, ratings, downloadable products, wishlists, product comparison, one-page checkout, advanced reporting, a rewards system and more. Paid versions are also available, and the same developer also offers a Joomla ecommerce plug-in called MijoShop. Operating System: OS Independent
528. Moltin
Created with developers in mind, Moltin is an API-based framework for adding ecommerce functionality to websites. Both free and paid versions are available on the website; you can find the source code at GitHub. Operating System: Windows, Linux, OS X
Claiming to be "stable and highly usable," nopCommerce has been downloaded more than 1.5 million times. Key features include mobile commerce, multi-store capabilities, SEO, and marketing features like a reward points system, discounts and coupons, Facebook export, related products upselling, newsletter subscriptions, product reviews and ratings, product comparison and an affiliate program. Operating System: Windows.
530. OpenCart
"Feature-rich and user-friendly," OpenCart offers a visually appealing interface, multi-currency and multi-language support, product reviews and ratings, SEO, PCI compliance, sales reports, discounting and more. Commercial support is provided through partners. Operating system: Windows, Linux, OS X
531. OrderStorm
This ecommerce plug-in includes CRM capabilities and works with any WordPress theme. Although the plug-in is free and open source, the site mainly promotes the SaaS versions. Operating System: OS Independent
Orilla Cart promises unlimited customization, flexible layouts, ease of use, speed and agility. Paid support is available. Operating System: OS Independent
533. osCMax
A fork of osCommerce (see below), osCMax boasts features like vouchers and coupons, virtual product support, web-based administration, customer loyalty discounts, SEO-friendly URLs, an article manager and more. Paid documentation is available. Operating System: Windows, Linux
534. osCommerce
Used by more than 280,000 online stores, osCommerce has been around for 16 years. Services are available through third-party partners. Operating System: Windows, Linux, OS X.
535. OXID eShop
OXID offers B2B and B2C ecommerce, as well as omnichannel solutions. The open source version is called eShop, and it has a large and vibrant user community. Operating System: Windows, Linux, OS X
536. Piggybak
Based on Ruby on Rails, Piggybak offers "basic shopping cart and one-page checkout functionality." There's a demo on the site so that you can see it in action. Operating System: Windows, Linux, OS X
537. Plici
Slightly less polished than some of the other ecommerce solutions on our list, Plici promises a "powerful and extensible" solution. Much of the documentation is in French, but English translations are available. Operating System: Windows, Linux
538. PrestaShop
Boasting more than 250,000 users, PrestaShop is a very popular ecommerce solution with mobile-responsive design, advanced SEO features, in-depth sales statistics, dynamic pricing rules, coupons and vouchers, reviews, loyalty programs and email marketing. Paid cloud and expert versions are available, as well as the free download. Operating System: Windows, Linux, OS X.
539. Ror-e.com
Based on Ruby on Rails, Ror-e.com is a very simple shopping cart designed for small businesses. The website includes a demo so you can see it in action. Operating System: Windows, Linux, OS X.
540. Saleor
Based on Satchless (see below), Saleor is a full-fledged ecommerce store. It’s SEO-friendly, optimized for performance and easily customizable. Operating System: Windows, Linux, OS X.
541. Satchless
Satchless is for experienced developers who want to build an ecommerce site using Python. You can use it with or without a framework like Django or Flask. Operating System: Windows, Linux, OS X.
Forked from xt:Commerce (see below), this ecommerce project is based on PHP and SQL. Note that much of the website is in German. Operating System: Windows, Linux, OS X
543. Shopp
Formerly a paid plug-in, Shopp is now free and open source (although users can still purchase paid support if they wish). It boasts outstanding security, integration with many payment processing services, fast performance and more. Operating System: OS Independent
Developed in New Zealand, this e-commerce platform comes with two free hours of support. Paid support is also available, and the website functions as a working demo. Operating System: OS Independent
This lightweight JavaScript-based shopping cart aims to be easy to integrate into existing websites. Note that in order to use it, you will need some basic understanding of HTML. Operating System: OS Independent
If you don't want all the bells and whistles, this WordPress plug-in might be for you. It's a simple cart that accepts PayPal only. Operating System: OS Independent
Another bare-bones, PayPal-only solution, this shopping cart is lightweight and easy to use. It is highly rated and has been installed more than 40,000 times. Operating System: OS Independent
For Windows users, SmartStore.NET is a multilingual, SEO-optimized, mobile optimized, customizable and scalable ecommerce solution. The organization offers several levels of paid support. Operating System: Windows
Powering more than 45,000 online retail sites, Spreecommerce offers modular architecture, customization, responsive site design and more. It's won several awards, and extensive documentation can be found on the site. Operating System: OS Independent
This WordPress plug-in works equally well for developers selling software (or WordPress themes) and regular online retailers. You can extend its capabilities with several paid plug-ins. Operating System: OS Independent
This mobile-friendly project claims to be "the first open source shopping cart solution designed for offering great user experience for all digital devices. Key marketing features include a banner manager, Google Adsense integration, Web analytics, SEO, email system, catalog management, reviews and ratings, wishlists, "tell a friend," discounts, newsletters and more. Operating System: Windows, Linux
552. Ubercart
This shopping cart is designed to be used alongside the popular Drupal content management solution. The website says it is a good option for people who want to "build a community around a product, sell access to premium content, [and] offer paid file downloads." Operating System: Windows, Linux, OS X
553. Vespolina
Highly scalable Vespolina was designed "to grow from a single person store to a multi-national store." It's based on PHP. Operating System: OS Independent
554. VirtueMart
VirtueMart works with the Joomla content management solution and boasts more than 500 features. It's designed to be very easy to use, and the website offers lots of links to live stores so that you can see it in action. Operating System: Windows, Linux, OS X
The self-proclaimed "most popular WordPress eCommerce plug-in," WooCommerce offers a wide variety of themes, plus PayPal integration, multiple shipping options, easy inventory and reporting, marketing capabilities, simplified tax handling and more. Paid extensions and services are avialable. Operating System: OS Independent
Powering more than 55,000 stores, WordPress's eCommerce plug-in promises "everything you need to sell anywhere." Support and premium extensions are available for a fee. Operating System: OS Independent
This is a full-featured enterprise-class shopping cart solution. It also comes in a Pro version and several paid extensions are also available for purchase. Operating System: OS Independent
558. X-Cart
Now 15 years old, X-Cart handled more than $2.3 billion in transactions from more than 35,000 stores last year. It's PHP-based, and multiple paid versions are available. Operating System: Windows, Linux, OS X
This mature online shopping system includes features like front-end templates, SEO, mobile support, multiple payment and portal options, add-ons and support for multiple languages, including English. Paid support, hosting, and professional and multi-shop versions are available. Operating System: Windows, Linux, OS X
560. Zen Cart
Designed with the needs of shop owners and shoppers in mind, Zen Cart is a customizable ecommerce platform that easily integrates with multiple payment gateways. Paid video training and related services are available. Operating System: OS Independent.
561. Zeuscart
Zeuscart boasts a rich user interface that focuses on Web 2.0 trends. It is designed primarily for small to medium-sized companies. Paid services are available. Operating System: Windows, Linux

Educational Testing

562. iTest
This client-server based software makes it easy to give each student a different version of a test because it can pull questions from a pre-established database. It's available in nine different languages. Operating System: Windows, Linux, OS X.
If you're giving a browser-based test (for example, through a learning management system), this tool locks down the student's system so they can't browse the Internet or access other applications while taking the exam. It can be used with student-owned PCs, as well as with school-owned, networked systems. Operating System: Windows.
564. TCExam
This computer-based assessment software aims to simplify the creation, delivery and scoring of tests. It's available under an open source license for non-commercial use or with a paid commercial license. Operating System: OS Independent

Electronic Health Records (EHR)

565. GNUmed
This project aims at helping medical providers "better document, understand, plan, and manage their patients' health and health care delivery." It's been translated into multiple languages, and the website includes success stories from practitioners who have used it in several different countries. Operating System: Windows, Linux, OS X
566. GaiaEHR
This Web-based EHR and practice management solution boasts a modern, intuitive interface. See it in action with the online demo. Operating System: Windows, Linux, OS X
567. GNU Health
An official GNU project, this award-winning application combines EMR functionality with a hospital information system and a health information system. It was designed to comply with industry standards, and it's been adopted by the United Nations University. Operating System: Windows, Linux, OS X
568. M
Also known as "Mountain Meadow Medical Records," M is an EMR program that a practice in Virginia has been using for a decade. It offers an intuitive interface and fast performance. Operating System: Windows, Linux, OS X
Built on the Tolven Platform, Neuron is an EHR system created by software company Roberts-Hoffman. It was designed to adapt to provider workflows, communicate with other systems and use the latest technologies. Operating System: OS Independent.
570. OpenEMR
Certified by the Office of the National Coordinator of Health Information Technology, OpenEMR boasts that it is "one of the most popular open source electronic medical records in use today." Commercial support is available through third-party partners. Operating System: Windows, Linux
571. OpenMRS
OpenMRS began as a project to fix the medical record system at a clinic in Kenya and has grown into a leading open source medical record system used around the world, particularly in developing countries. It describes itself as "both just a library of API calls and a database and a default implementation of those API calls in the form of a web application." Operating System: Windows, Linux, OS X
572. OpenVista
Owned by Medsphere, Open Vista is the open source version of the Veterans Administration's VISTA EHR system. Because the technology has already been used extensively at more than 1500 VA facilities, it's one of the more mature and usable open source EHR's, and users say it compares very favorably with proprietary solutions. Operating System: Windows, Linux
573. WorldVista
Like OpenVista, WorldVista is also based on the VISTA EHR software developed for the Veterans Administration. It's ONC-ATCB certified, and it adds several modules not included in VISTA, such as pediatrics and obstetrics. Operating System: Windows, Linux
574. ZEPRS
Short for "Zambia Electronic Perinatal Record System," this unique EHR was specifically designed to improve obstetrics care in Africa. It's now been in use in clinics throughout Zambia for five years. Operating System: Linux

Elementary Education

575. ChildsPlay
Best for preschoolers and toddlers, ChildsPlay is a set of memory matching, letter recognition and simple math games. It also includes a few less-educational activities like puzzles, pong, pacman and billiards. Operating System: Windows, Linux, OS X.
576. GCompris
With more than 100 activities, GCompris is huge collection of educational games for children. It can help users learn to read, to tell time, to understand the water cycle, to draw cartoons, to identify different country maps, to play chess and much more. Operating System: Windows, Linux.
577. KLettres
KLettres teaches the very youngest computer users to recognize the appearance and sound of letters and syllables. It's also useful for older computer users who are learning a new language, such as Arabic, Czech, Brazilian Portuguese, Danish, Dutch, British English, English, English Phonix, French, German, Hebrew, Hungarian, Italian, Kannada, Hebrew, Hindi Romanized, Low Saxon, Luganda, Malayalam, Norwegian BokmÃ¥l, Punjabi, Spanish, Slovak, Ukrainian or Telugu. (Note that in order to use KLettres on Windows, you'll have to download KDE for Windows.) Operating System: Windows, Linux.
578. TuxMath
Quick! Solve the math problems before the comet kills the penguin. The user can select the appropriate difficulty, whether that's adding numbers zero through three or multiplying and dividing negative and positive integers. Operating System: Windows, Linux, OS X.
579. Tux Paint
An educational option for pre-schoolers, Tux Paint is a simplified drawing program that is extremely easy to use. It includes fun sound effects, a stamping tool, a cartoon mascot and other features designed to appeal to youngters. Operating System: Windows, Linux, OS X.

E-mail

580. Evolution
Known as "the Outlook of Linux," Evolution offers a very familiar interface for joint email, calendar and address book. It's popular among Linux users and integrates with many other open source applications. Operating System: Linux.
Made by Mozilla (the organization behind the Firefox browser), Thunderbird is an email client with an easy-to-use interface with advanced search, security and customization capabilities. A separate project called Lightning adds calendar functionality to make it more like other groupware applications. Operating System: Windows, Linux, OS X

E-mail Marketing

582. Inker
Inker describes itself as "a front-end CSS and HTML email framework and delivery API that will change how you think about one-to-one emails in your company." It handles both coding and delivery. Operating System: OS Independent.
583. OpenEMM
With nearly 600,000 downloads, OpenEMM claims to be the "most successful e-mail software worldwide." It's available on a SaaS basis, as well as on-premise versions. Operating System: Windows, Linux.
584. phpList
This open source e-mail marketing solution was used to send more than 22 billion messages last year. Subscriptions to the cloud-based service start at just $1. Operating System: OS Independent.

Encryption

585. AxCrypt
With more than 3.2 million users, this Windows-only encryption solution is tremendously popular. Features include password protection, integration with Windows Explorer and support for multiple languages. It can encrypt files stored on your hardware or on a cloud service, including Dropbox, Google Drive and Microsoft OneDrive. Operating System: Windows
586. Ccrypt
This replacement for the standard Unix crypt function uses the Rijndael block cipher version of AES to provide strong encryption. Like Crypt (below), it doesn't have a graphic interface and is best used by those comfortable working from the command line. Operating System: Windows, Linux, OS X
587. Crypt
At just 44KB, this is one of the fastest, lightest weight encryption tools available. However, because it's a command line tool, it's best for experienced system administrators or advanced users. Operating System: Windows
588. Encrypt
Also designed to be small and lightweight, Encrypt is a cross-platform tool with strong encryption capabilities. It aims to be fast and easy to use. Operating System: Windows, Linux, OS X, Android
This command-line tool implements the OpenPGP standard to encrypt email communications. It's utilized by a number of other open source encryption tools. Operating System: Linux.
590. Gpg4win
This is the version of GNU Privacy Guard (GPG) for Windows users. It encrypts fils and email, and paid professional support is available. Operating System: Windows
591. GPG Tools
This app ports GPG for Mac users and is based on MacGPG. Several other encryption-related tools are also on the site. Operating System: OS X.
LUKS stands for "Linux Unified Key Setup," and it encrypts an entire drive. It's useful for hard disk backups and other types of storage that need password protection. Operating System: Linux
593. MCrypt
This replacement for the Unix crypt allows developers to add a wide range of encryption functions to their code, even if they don't know a lot about cryptography. The Web site contains a list of supported algorithms that are included in the Libmcrypt library. Operating System: Windows, Linux, Unix
594. NeoCrypt
This file-based encryption program supports AES, DES, Triple-DES, IDEA, RC4, RC5, CAST-128, BlowFish, SkipJack and other algorithms. Like AxCrypt, it integrates into Windows Explorer for ease of use. Operating System: Windows
Formerly known as Android Privacy Guard (APG), OpenKeyChain ports the OpenPGP encryption tool to Android devices. It allows users to communicate securely and integrates with many email and messaging tools. Operating System: Android

Enterprise Resource Planning (ERP)

Short for "Open for Business," this Apache ERP solution offers a number of capabilities for marketing teams, including advanced ecommerce, catalog management, promotion and pricing management, CRM, content management, and more. In addition, it also includes traditional ERP functionality like accounting, supply chain management, project management, etc. Operating System: OS Independent
597. Compiere
Compiere offers features like warehouse management, purchasing, manufacturing, sales, ecommerce, customer service, materials management, order management, financial management and reporting. It's paid professional and enterprise versions are built to be easily deployed on Amazon's EC2 service. Operating System: Windows, Linux, OS X.
This Web-based ERP solution was created for smaller companies, foundations and freelancers. Partners around the world provide support and other services, including cloud-based hosting. There is also an online marketplace with a variety of add-ons to extend its capabilities. Operating System: OS Independent
599. iDempiere
This community-run ERP, CRM and supply chain management solution is a fork of an earlier project called ADempiere, which was itself a fork of Compiere. iDempiere, as it is now called, has adopted OSGi standards and continued development on the ADempiere code. A good option for international organizations, it can handle multiple organizations, multiple languages, multiple currencies and multiple accounting formats. It offers tools for materials management, procurement, sales and marketing, manufacturing management, accounting and more. Because it is Java-based, it can run on Linux, Windows or Mac OS X servers; it also requires a PostgreSQL or Oracle database. Operating System: Windows, Linux, OS X, others
600. ERP5
This award-winning application includes CRM, production management, supply chain management, product design management, and HR features as well as standard ERP capabilities. In addition to the free download, it's also available on an SaaS basis that has a free pricing tier. Operating System: OS Independent
GNU Enterprise contains a host of developer and ERP tools, including human resources, accounting, CRM, project management, supply chain management, and e-commerce features. Its modular design and open architecture make it easy to customize and easy to maintain. Operating System: Windows, Linux, OS X.
602. Odoo
Used by organizations like the World Wildlife Federation, Toyota, Cox Communications, Hyundai and Danone, Odoo promises to simplify omnichannel sales. It comes in a free community version or paid enterprise and online versions. Operating System: Windows, Linux.
603. Openbravo
Openbravo offers specialized ERP software for retailers, as well as a business suite for companies of all types. The open source version can be found on the company's Community Hub; paid professional and enterprise versions are available through its partners. Operating System: OS Independent.
604. opentaps
This solution combines ERP and CRM functionality and is designed to help business owners manager their companies more effectively. It has pre-loaded machine images on Amazon EC2 that make it possible to get the software up and running in the cloud in just minutes. Operating System: Windows, Linux.
Another solution for SMBs, Plazma includes tools for tracking contacts and accounts, sales and projects, orders and invoices, marketing compaigns, phone calls, meetings and document management. The interface is basic but easy to use. Note that it requires a SQL database in order to run. Operating System: Windows, Linux, OS X
Downloaded more than a million times, project-open offers enterprise-class project management, professional service automation and IT service management capabilities. It has won several awards and has been under development for more than ten years.
The software comes in four different editions. Community is the free standard version designed to meet the needs of small to midsize business. The paid Professional edition adds features like LDAP integration, financial reports and data warehouse, as well as support. The Enterprise edition adds even more, like audit modules, one-time passwords, and SAP integration, and the extended Edition offers the Enterprise features with additional support. Operating System: Windows, Linux
607. SQL-Ledger
This Web-based ERP solution installs in just minutes and offers a very simple, intuitive interface. It also comes in an enterprise edition that includes technical and development support. Operating System: Windows, Linux, OS X
608. webERP
As you might guess from the name, webERP runs in a browser and provides a wide range of business administration and accounting tools. It offers quite a few features that make it especially suitable for wholesalers, distributors and manufacturing companies. Operating System: OS Independent
Targeted at manufacturers and distributors, xTuple claims to be the "world's #1 open source ERP." It offers multiple editions, including a cloud hosted version. Operating System: Windows, Linux, OS X.

Family Tracing and Reunification

610. RapidFTR
In crisis situations like earthquakes and other disasters, children often get separated from their families. This mobile app makes it easier to collect, share and manage information about these children so that they can be reunited with their families more quickly. Operating System: OS Independent

Feed Reader

611. Stringer
Still looking for an alternative to Google Reader? If you're tech-savvy enough to deploy it on your own server, Stringer might be for you. It's a "self-hosted, anti-social RSS reader" with no social or sharing capabilities but plenty of keyboard shortcuts. Operating System: OS Independent

File Managers

612. Explorer++
Explorer++ extends the capabilities of the standard Windows Explorer with tabbed browsing, an improved interface, keyboard shortcuts, file merge, file split, and customization capabilities. Like the regular Windows Explorer, it also offers drag-and-drop functionality. Operating System: Windows
613. Krusader
The KDE file manager, Krusader is a twin-panel commander-style file manager. It boasts extensive support for archived files, advanced search, batch re-naming, file content comparisons and more. Operating System: Linux
Java-based muCommander supports local volumes plus FTP, SFTP, SMB, NFS, HTTP, Amazon S3, Hadoop HDFS and Bonjour. It makes it easy to quickly move and rename files and also includes compression capabilities. Operating System: Windows, Linux, OS X.
615. Nautilus
Nautilus, the file manager for the Gnome desktop, is available for most Linux distributions. The intuitive interface should feel familiar to anyone who's ever used a file manager. Operating System: Linux

File Sharing

616. ANts P2P
Designed for security and privacy, ANts P2P encrypts everything you send or receive over the network and masks connections so that users are untraceable. It's Java-based, so it will run on most platforms. Operating System: OS Independent.
617. Ares
Very recently updated, Ares is a BitTorrent client and chat program that allows users to share images, audio, video, software and documents. It includes a built-in player and a library organizer. Operating System: Windows.
618. DC++
This Windows client for the Direct Connect/Advanced Direct Connect file-sharing network has been downloaded millions of times. The site includes a helpful tutorial and beginner's guide for those who aren't sure how P2P works. Operating System: Windows.
619. eMule
eMule claims to be one of the most popular peer-to-peer file-sharing clients available. It can download torrents and offers fast performance and search. Operating System: Windows, OS X.
620. FrostWire
FrostWire is a combination BitTorrent client, YouTube downloader and media player. It also supports Android devices, so you can take your media files with you on the go. Operating System: Windows, Linux, OS X, Android.
621. RetroShare
With most file sharing apps, you open up your files to the entire Internet, but with RetroShare, you share files and communicate only with trusted friends. It lets you set up your own secure file-sharing network and offers features like encrypted and communications and strong authentication. Operating System: Windows, Linux, Unix, BSD
This Windows peer-to-peer client offers support for multiple networks including EDonkey2000, Gnutella, BitTorrent and Gnutella2. Key features include global searching, multiple results tabs, previews, user comments, ratings, skinnable interface, sophisticated file-hashing and block lists to enhance security. Operating System: Windows.
623. Sharefest
If you combined Dropbox and Bittorrent, the result would be something like Sharefest. It allows you to share files with anyone without storing them in the cloud. The link above takes you to the actual service, but you can find the source code on GitHub. Operating System: OS Independent
624. Vuze
One of the most popular BitTorrent clients, Vuze makes it easy for novices to get started downloading hi-def video while offering plenty of features for advanced users. Operating System: Windows, Linux/Unix, OS X

File Transfer

625. Connectbot
A good option for UNIX administrators, Connectbot is a SecureShell (SSH) client that allows users to manage simultaneous SSH sessions, create secure tunnels, and copy/paste between other applications. If you search for the app on Google Play, you'll also find a fork that updates some of its capabilities. Operating System: Android
626. FileZilla
FileZilla also offers clients for SFTP, FTP, SCP and FTPS file transfer. In addition, there's a Windows-only version that will allow you to set up your own FTP server. Operating System: Windows, Linux, OS X.
627. FireFTP
This Firefox add-on has been downloaded more than 33 million times. It allows you to download files via FTP or SFTP right from your browser window. Operating System: Windows, Linux, OS X
628. WinSCP
Award-winning WinSCP can transfer files securely via SFTP, SCP or FTPS (and it also includes an FTP client for transferring files without security). It includes two different interface choices. Operating System: Windows.

Flashcards

629. Anki
This app boasts that it can help students learn just about any type of information, whether they are learning a new language, studying for medical exams or trying to remember guitar chords. It comes in iOS and Android versions, making it ideal for learning on the go. Operating System: Windows, Linux, OS X, iOS, Android.
630. Genius
If you need to memorize something—anything—Genius can help. It's a spaced repetition flashcard program that can help you pass a test, master a subject, prepare for a speech and more. Operating System: OS X
631. jVLT
Very similar to FlashQard, Java-based jVLT also uses the Leitner method to help students master concepts. However, this app focuses primarily on vocabulary, making it ideal for students who are studying a foreign language. Operating System: Windows, Linux, OS X
One of the better flashcard apps available, Mnemosyne was born from a research project that is studying the nature of long-term memory. It supports multiple card formats and uses an algorithm to determine which card should appear next. Users who choose to do so can upload their progress anonymously in order to provide data for the research team. Operating System: Windows, Linux, OS X, Android/
633. Parley
In addition to traditional flashcards, Parley also utilizes anagrams, multiple choice, fill-in-the-blank, synonym/antonym and other types of tests to improve your vocabulary. Many user-created card sets are available at KDE for Windows. Operating System: Windows, Linux
634. Pauker
Java-based Pauker lets you take your flashcards with you on almost any device. Like many of the other apps in this category, it uses the Leitner method of flashcard presentation to strengthen your ultra-short-term, short-term, and long-term memory. Operating System: OS Independent

Foreign Language Instruction

635. Zkanji
Designed to be useful for advanced students and beginners alike, Zkanji is a Japanese dictionary and flash card system. It also includes an animated kanji stroke order tool for learning to write the characters. Operating System: Windows
636. ZWDisplay
ZWDisplay is especially good at teaching users to read and understand Chinese text. It uses a system based on the book Chinese Through Tone & Color by Nathan Dummitt. Operating System: Linux

Forensics

If you need to examine a drive in detail, The Sleuth Kit is a set of command-line tools for digital analysis, and Autopsy Browser provides a graphical interface for using those tools. The same team is also working on Sleuth Kit Hadoop Framework, a cloud-based tool for analyzing many drives very quickly. Operating System: Windows, Linux, OS X.

Games

638. 0 A.D.
This historical real-time strategy game allows players to lead their own ancient civilization. It's won several awards, boasts realistic historical details and includes a map editor. Operating System: Linux, Windows, OS X.
639. 2048
This simple puzzle game is surprisingly addictive. Move numbers around the grid until the numbers combine to hit 2048. Run out of moves and your turn is over. Operating System: Online, iOS, Android.
Built "in the tradition of the Battle Isle series," ASC is a turn-based strategy game with 2D graphics and an overhead view of the action. You can expand the basic game with one (or more) of the many user-created maps available on the website. Operating System: Windows, Linux.
According to its website, this sci-fi-based shooter "features immersive arenas, freaky and violent weapons, and a vibrant community." It's tremendously popular with plenty of game servers, fan sites and tournaments available online. Operating System: Linux, Windows, OS X.
This PC and Android game features "roller coasters from hell that we travel at full speed in a barrage of explosions." There are 25 main levels, plus boss fights, and you can earn access to 18 more levels by getting a high score. Operating System: Windows, Linux, Android.
An "old school arcade game slung into the 21st century," Armagatron Advanced is a 3D take on the Tron light cycle game from the 80s. Up to sixteen people can play at once, against each other and/or the AI. Operating System: Windows, Linux, OS X, Android.
AssaultCube offers extremely realistic settings but is lightweight and low latency, making it a good option for players with underpowered systems or poor connection speeds. It includes twelve different multiplayer modes and 26 different maps, plus a map editor so you can create your own. Operating System: Linux, Windows, OS X.
This fork of the popular first-person shooter integrates some of the best features of Battlefield, Quake and Call of Duty into AssaultCube, while maintaining a lightweight footprint. Other improvements include ricochet shots, new weapons, improved radar and more. Operating System: Windows, Linux
Those who enjoy high fantasy will like this turn-based tactical strategy game that features elves, dwarves, orc, mermen and many other races. Play against up to eight other players in multiplayer mode. Operating System: Linux, Windows, OS X, iOS.
647. Billiards
Designed to help pool players practice when a real table isn't available, Billiards has a very lifelike physics simulator. It includes both pool and billiards tables and can play eightball, nineball and carom. Operating System: Linux.
648. Bitfighter
Customize your starship and battle against enemies in this "fast-paced team-based outer-space multi-player arcade game." Several online servers are available. Operating System: Windows, Linux, OS X, Android.
649. BosWars
Many real-time strategy games are set in the past, but Bos Wars is set in the future. Both single- and multi-player games are available. Operating System: Windows, Linux, BSD, OS X.
Research suggests that dual n-back activities can improve working memory and fluid intelligence, and they also seem to help some ADHD/ADD sufferers. Downloaded more than 384,000 times, Brain Workshop lets you give your brain a workout by trying dual n-back exercises for yourself. Operating System: Windows, Linux, OS X
651. BZFlag
Short for "Battle Zone Capture the Flag," BZFlag is a 3D multiplayer online tank game with retro graphics. It gets hundreds of downloads every week, and there's a tremendous amount of help on the website for new players. Operating System: Windows, Linux, OS X.
A rogue-like adventure game, Cataclysm is set in the first days after an apocalypse. Players must find food, shelter, water and defense while battling zombies and other horrors. Operating System: Windows, Linux, OS X.
This self-described "silly zombie shooter game," features tanks, boats, helicopters, trains and, of course, zombies. You can view the action from the top down, in first-person or in third person, and you can play alone or with friends. Operating System: Windows, Linux, OS X, Android.
This vertically scrolling shooter game invites you to pilot the cargo spaceship Chromium BSU through a maze of enemy fighters, attempting to destroy them before they destroy you. It's fast-paced and hard enough that most games don't last longer than fifteen minutes. (Note that this game doesn't have anything to do with Google's Chromium project.) Operating System: Windows, Linux.
Downloaded millions of times, the classic version of Nexuiz has been beloved by many generations of gamers. Note that this is the older open source version, but there is also a newer paid version. Operating System: Windows, Linux, OS X.
Suitable for ages 9 and up, Code Combat is a multi-player game that teaches players how to code. You can play online through the website or download it from GitHub. It offers more than 110 free levels, and tutorials and other levels are available with a subscription. Operating System: OS Independent
Forked from Boswars, this real-time strategy game is set in Stalinist Russia. Build up your economy and army quickly so that you're ready for the eventual Nazi attack. Operating System: Windows, Linux.
658. Crossfire
This old-school dungeon crawler invites players to explore a fantasy world, battle monsters, master magic and uncover treasure. The graphics are extremely simplistic, but the world is large with 3,000 different maps, 150 monsters, 13 races and 15 different types of characters to play. Operating System: Windows, Linux, OS X.
Build elevated trains on a city grid with this puzzle game. A paid expansion pack ads 11 more levels. Operating System: Windows, Linux, OS X.
660. Domination
Domination is a modified version of the board game Risk for PCs and mobile devices. Several different maps are available, and it has a multi-player option. The mobile versions are available through Google Play or the Amazon Appstore. Operating System: Windows, Linux, OS X, Android, Blackberry.
This game describes itself as "A roguelike adventure through dungeons filled with dangerous monsters in a quest to find the mystifyingly fabulous Orb of Zot." You can download the game and play alone or access one of the many online game servers. Operating System: Windows, Linux, OS X, Android.
662. Egoboo
This 3D dungeon-crawler challenges players to save Lord Bishop from the clutches of the evil Dracolich, slaying hordes of monsters along the way. Play with up to four other people as you make your way through 40 different dungeons. Operating System: Windows, Linux, OS X
663. Enigma
The latest version of this classic puzzle game, released last December, adds 51 new levels to the thousands already available. It's extremely popular and highly praised for its addictive gameplay. Operating System: Windows, Linux, OS X.
Epic Inventor is a side-scrolling role-playing game with multiple levels. It has been compared to Minecraft, except that the emphasis is on crafting items instead of on building. Operating System: Windows, Linux.
This epic adventure puts you in the shoes of a futuristic space traveler suddenly transported to King Arthur's court in Camelot. It includes 42 solo-play levels and 27 multiplayer levels. Operating System: Windows, Linux, OS X.
This updated version of the classic Linux game Tux Racer features Tux the Linux penguin sliding down a mountain on his belly just like the original. Race your friends to see who can achieve the fastest time. Operating System: Windows, Linux, OS X.
More than a decade old, this puzzle game challenges players to help two fish escape from increasingly difficult levels. It's a remake of an older ALTAR interactive game. Operating System: Windows, Linux, OS X.
668. Flare
In this action-adventure game, players must battle against multiple enemies as they make their way through various landscapes. They interact with other players, collect items in the inventory and master various skills. Operating System: Windows, Linux, OS X.
669. FlightGear
This top-notch flight simulator is so realistic it can be used to help with pilot training, industrial engineering or research. The basic software is free, but you can purchase additional aircraft and scenery (as well as mugs and T-shirts) from the website. Operating System: Windows, Linux, OS X, others.
670. FreeCol
In this turn-based strategy game, play starts in America in 1942, and you win if you eventually declare independence from Britain and survive the Revolution. It's very similar to the games Colonization and Civilization. Operating System: Windows, Linux, OS X.
671. FreeCiv
Inspired by the game Civilization, FreeCiv is a turn-based multi-player strategy game where players must guide their tribes from the stone age to the space age. It's a mature game with plenty of online help available for new players. Operating System: Windows, Linux, OS X.
672. Freedoom
Freedoom is based on the Doom engine, but adds free content. It offers plenty of action, and it is compatible with mods created for the original Doom. Operating System: Windows, Linux, OS X, Android.
673. Freeminer
If you're feeling nervous about Microsoft's purchase of Minecraft, check out Freeminer. Very similar to Minecraft, this game features a nearly infinite world where players can dig and build whatever they can imagine. Operating System: Windows, Linux, OS X.
674. FreeOrion
Built in "the tradition of the Master of Orion games," FreeOrion is an empire-building strategy game set in the reaches of space. Play against the AI or against other humans in multiplayer mode. Operating System: Windows, Linux, OS X.
You can think of Frets on Fire as an open source version of Guitar Hero that you can play with a guitar controller or your keyboard. It can play Guitar Hero songs or the many songs created by the community, or you can create your own songs with the built-in editor. Operating System: Windows, Linux, OS X.
This classic Linux game has spawned an entire genre of similar games. This version offers more than 100 levels, multiplayer support and a level editor. Operating System: Windows, Linux.
Gang Garrison 2 is a 2D "demake" of Team Fortress 2. It has received rave reviews and has been downloaded more than 130,000 times. Operating System: Windows.
678. GBrainy
For players of all ages, GBrainy offers logic puzzles, mental calculation, memory trainers and verbal analogy games. It's goal is to help users stay sharp mentally. Operating System: Windows, Linux.
679. Glest
In this real-time strategy game, the armies of Tech and Magic war against each other. It has won several awards and inspired many other games, including MegaGlest (see below). Operating System: Windows, Linux.
This real-time civilization-building strategy game aims to reduce the need for micro-management and allow players to focus on strategy. Single- or multi-player games and a level editor are available. Operating System: Windows, Linux.
681. GLtron
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Inspired by the movie Tron, this movie features lightcycles that race around a futuristic track. It's an older game, but still playable. Operating System: Windows, Linux, OS X
682. GnomeGames
This collection includes fifteen different casual games that you can play in five minutes or less. It includes Sudoku, a minesweeper game, Mahjong, a version of Reversi and more. Operating System: Linux.
Based on a neural network, this backgammon game has an AI that is constantly improving its abilities. It not only allows users to play games, they can also use it to analyze and improve their gameplay. Operating System: Windows, Linux, OS X.
684. Golems
If you can dream it, you can build it with this physics simulator. Create a robot, spaceship, bulldozer, cannon, mouse trap or whatever else comes to mind. Operating System: Windows, Linux, OS X.
Pilot a futuristic vehicle around one of more than 28 different racetracks. Play against up to four other players on the same PC. Operating System: Windows, Linux, Android.
686. Hedgewars
This turn-based strategy game places a heavy emphasis on comedy as it follows "the antics of pink hedgehogs with attitude as they battle from the depths of hell to the depths of space." It supports up to 8 players and includes 31 environments, 48 set image maps, infinite randomly generated maps, 55 weapons, 280 different costumes and much more. Operating System: Windows, Linux, OS X, iOS.
From the makers of Those Funny Funguloids comes this self-described "extreme leisure time activity." The gameplay primarily involves smashing tomatoes. Operating System: Windows, Linux.
688. JVGS
Truly unique, JVGS features a stick-figure poet who travels through a landscape that appears to be drawn by hand in pencil. Eerie music and lines of poetry interspersed throughout the game give it a haunting quality. Operating System: Windows, Linux, OS X.
689. KDE Games
The KDE desktop for Linux (which can also be downloaded for Windows) includes a wide variety of arcade, board, card, dice, logic and strategy games. The collection includes a sudoku game, a golf game, a Breakout clone, Mahjongg, a version of Reversi, solitaire, a variation of Yahtzee, a minesweeper game, a version of Risk and much more. Operating System: Windows, Linux.
In this real-time strategy game, systems, hackers and networks fight against each other in a digital landscape that resembles Tron. Unlike many other real-time strategy games, all resources are free, leaving players free to concentrate on battle. Operating System: Linux, Windows
This old-fashioned platform game follows the adventures of a young knight who sets out to rescue his father, battling monsters, overcoming obstacles and solving puzzles along the way. Play with the keyboard or a joystick. Operating System: Windows, Linux, OS X.
Designed for mature audiences only, Lips of Suna features "violence, crude humor, nudity and other themes you can rarely see in other games anymore." The game world changes dynamically, and it's very customizable. Operating System: Windows, Linux.
693. Liquid War
Highly unusual, this game invites players to control an army of liquid which they use to try to consume other players' armies. It has won some awards, but be aware that the graphics are fairly unimpressive. Operating System: Windows, Linux, OS X.
Still under development, The Mana World is a 2D Massively Multiplayer Online Role-Playing Game (MMORPG). In order to play, you'll need to create an account and download the Manaplus client. It has only a few users however; at the time of writing 21 were online. Operating System: Windows, Linux, OS X.
695. MegaGlest
Forked from the original Glest, MegaGlest adds Egyptians, Indians, Norsemen, Persians and Romans to the original two Tech and Magic teams. It also offers better network multiplayer capabilities than its predecessor. Operating System: Windows, Linux.
696. Micropolis
Based on the old Maxis SimCity code, Micropolis lets you manage existing cities like San Francisco, Tokyo or Rio de Janeiro or to create your own. It includes eight built-in scenarios for hours of open-ended play. Operating System: Windows, Linux, OS X.
697. Minetest
If you've ever played Minecraft, Minetest will feel eerily similar. Explore, dig, build and craft objects in this nearly infinite world. Operating System: Windows, Linux, OS X.
698. NetHack
NetHack is a classic dungeon crawler that uses only the most minimalist graphics to represent maps, players, treasures, monsters and objects in the game. The ultimate goal: retrieve the Amulet of Yendor and escape the Mazes of Menace alive. Operating System: Windows, Linux, Classic Mac.
699. No Gravity
No Gravity takes players to the year 8002, where they must accomplish fifty-five missions in deep space. Note that this link takes you to the original open source version, but there are also paid sequel versions available for PSP, OS X, iOS, Android, Windows and Windows Phone. Operating System: Windows, Linux, OS X.
700. Neverball
This mature game requires users to tilt the floor to move a ball through a level. There's also a new demo showing the game running on the Oculus Rift virtual reality platform. Operating System: Windows, Linux, OS X.
701. Oolite
Oolite describes itself as "an open-world space opera." Inspired by the classic game Elite, it allows users to create their own story, whether they choose to become traders, pirates, smugglers, miners or space fighters. Operating System: Windows, Linux, OS X.
702. OpenArena
A clone of Quake III Arena, OpenArena is a multiplayer online first person shooter. It supports multiple game types, such as capture the flag, free for all, overload, harvester and others. Operating System: Windows, Linux, OS X.
703. OpenClonk
In this 2D game, you control clonks, "small but witty and nimble humanoid beings," as they mine, settle and battle. It is based on the shareware game Clonk. Operating System: Windows, Linux, OS X.
704. Open Sonic
As you might guess from the name, this is an open source version of Sonic the Hedgehog. It features cooperative gameplay where players can control up to three characters at the same time. It also offers a level editor for those who like to create their own modified versions. Operating System: Windows, Linux, OS X.
705. OpenTTD
This open source take on Transport Tycoon Deluxe enhances the original with bigger maps, support for up to 255 players, new pathfinding algorithms, the ability to bribe local officials and much more. There's plenty of online help and even a manual to help new players master the game, and it's available in multiple languages. Operating System: Windows, Linux, OS X.
Gameplay is fairly simple on this submarine strategy game. Spawn ships and fight to keep your factory ship alive. Operating System: Windows, Linux, OS X.
707. Pingus
If you loved the old game Lemmings, you'll probably love Pingus. It's very similar but features penguins instead of lemmings. It has 77 levels plus a level editor that lets you make your own. Operating System: Windows, Linux, OS X.
708. Pioneer
Travel in time to the end of the 31st century. Pilot your own spacecraft throughout the galaxy, exploring and looking for fame and fortune by whatever means you choose in this open-ended game. Operating System: Windows, Linux, OS X.
709. PlaneShift
Still a work in progress, PlaneShift is another open source MMORPG. It features ten different playable races, unlimited professions, six "ways of magic," hundreds of spells, 3D graphics and much more. Operating System: Windows, Linux, OS X.
710. PokerTH
The self-proclaimed "No. 1 open source poker app," PokerTH lets you play Texas Hold 'Em alone or against other players online. The online community at Poker-Heroes.com provides access to game servers, rankings and much more. Operating System: Windows, Linux, OS X, Android.
711. Powermanga
This 2D vertical scrolling space shooter offers more than 41 levels to play. Avoid the meteors while battling more than 60 different kinds of enemy ships. It runs easily on old or low-powered systems as well as newer desktops and laptops. Operating System: Windows, Linux.
712. Pushover
A clone of a game originally released in1992, Pushover requires players to move an ant through a level so that it knocks over all of the dominoes on the screen. Be careful—some of the dominoes don't fall the way you might expect. Operating System: Windows.
713. PySolFC
This huge collection of Solitaire games includes more than 1,000 variations on the classic card game. It includes multiple card decks, multiple background options, hints, statistics, unlimited undo and more. Operating System: Windows, Linux, OS X.
Called "nothing short of stupendous" by reviewers, Red Eclipse is a self-described "casual arena shooter" that is somewhat similar to Unreal Tournament games. It includes features like Parkour, impulse boosts and dashing, and it has a built-in map editor. Operating System: Windows, Linux, OS X.
While most vehicle simulators treat objects as hard, solid bodies, Rigs of Rods has a unique soft-body physics engine that more accurately simulates real-world behavior. It has a huge and very enthusiastic fan base that is constantly creating new vehicles and terrains for the game. Operating System: Windows, Linux, OS X.
716. Ryzom
Award-winning Ryzom is a very complete MMORPG with a full backstory, excellent graphics and unique gameplay. Players can choose to develop their skills, customize their characters and interact with the game world as they see fit. Operating System: Windows, Linux, OS X.
Highly customizable, this version of Scrabble lets you use the classic game board, the Superscrabble game board or your own custom board. It even supports 3D play. Operating System: Windows, Linux, OS X.
718. Scorched3D
If you fondly remember the classic DOS game Scorched Earth or if you just love watching mountains blow up, Schorched3D is for you. Multiple online servers are available, including one just for beginners. Operating System: Windows, Linux, OS X.
If you remember the old 2D Mario Bros. games fondly, you'll probably enjoy Secret Maryo Chronicles. It offers great old-school jump and run gameplay with plenty of levels. Operating System: Windows, Linux
720. ScummVM
ScummVM allows you to port many classic point-and-click adventure games to nearly any platform you like, including many mobile platforms. Supported games include Simon the Sorcerer 1 and 2, Beneath A Steel Sky, Broken Sword 1 and Broken Sword 2, Flight of the Amazon Queen, Monkey Island, Day of the Tentacle, Sam and Max, and dozens of others. Operating System: Windows, Linux, OS X, and many others
721. Simutrans
Build a successful transportation company that carries passengers, goods and mail between various locations. This mature game offers multiple graphics packages to choose from, and you can also choose to connect to an online game to play with people around the world. Operating System: Windows, Linux, OS X.
722. SlipStream
Designed to support any type of vehicle that could be driven around a racetrack, SlipStream is more difficult to learn than some other vehicle simulators, but offers more realistic handling as a tradeoff. Operating System: Linux
Inspired by Sonic the Hedgehog and built on the Doom Legacy engine, this 3D game features Sonic, Tails, Knuckles and Dr. Eggman in a new storyline. Both single- and multi-player modes are available. Operating System: Windows, Linux, OS X.
A fork of TORCS (see below), Speed Dreams is a motorsports simulator with excellent graphics. This version uses a slightly different physics engine and has some cars, tracks and minor UI improvements that you won't find in TORCS. Operating System: Windows, Linux.
725. Stendhal
Designed to be friendlier than some other MMORPGs, Stenhal has a "huge and rich world" with 2D graphics and "an old school feel." Explore the wilderness, fight dragons, complete a quest, become a hero. Operating System: Windows, Linux, OS X.
726. StepMania
Very similar to Dance Dance Revolution, StepMania challenges users to keep the beat of the music on dance pads or the keyboard. The game includes only a few songs, but you can find more in the forums on the website. Operating System: Windows, Linux/Unix, OS X, XBox.
Play alone or with up to eight other people in this role-playing game. It offers plenty of battle action against thieves, bandits, necromancers, poachers and other baddies. Operating System: Windows, Linux, OS X.
728. SuperTux
Reminiscent of the Mario Bros. games, this jump-and-run sidescroller follows Tux the Linux penguin through a variety of landscapes. There's a 12-year-old version that runs on old PCs and a stable beta version with an official updated version due in December. Operating System: Windows, Linux, OS X.
Downloaded thousands of times per week, SuperTuxKart is a very popular racing game that features Tux the Linux Penguin and his friends racing around a variety of tracks. The graphics and gameplay in the latest version are much improved from earlier editions, as you can see in the YouTube trailer for the game. Operating System: Windows, Linux, OS X.
This role-playing game attempts to update rogue-like games for the 21st century. Winner of multiple awards, it invites you to explore the continent of Maj'Eyal while battling against animals, monsters, trolls, giants, demons, zombies, necromancers, dragons and other evil forces. Operating System: Windows, Linux, OS X.
This browser-based game has a deeper purpose than entertainment—teaching beginning programmers to code in the Lua programming language. Note that you'll need to be fairly technical and have access to a Web server in order to get the game up and running. Operating System: Windows, Linux.
732. Teeworlds
This multi-player shooter features retro, cartoonish, 2D graphics and many different game modes. It supports up to 16 different players. Operating System: Windows, Linux, OS X.
Those Funny Funguloids calls itself "a space-flying-mushroom-picking-simulator," and that's a fairly apt description. It's a slow-moving, highly unusual game where you fly through space avoiding meteors and collecting mushrooms. Operating System: Windows, Linux.
734. TORCS
The Open Racing Care Simulator, a.k.a. TORCS, is one of the more realistic racing simulators available. There are multiple fan sites online, as well as regular tournaments. Operating System: Windows, Linux, OS X.
735. Tremulous
Tremulous aims to combine the characteristics of a first-person shooter with the characteristics of a real-time strategy game. You play as either an alien or a human, and you win by eliminating the other team and destroying their ability to respawn. Operating System: Windows, Linux, OS X, XBox.
736. TrueCombat
Set in the modern world, TrueCombat calls itself "perhaps the best free tactical-realism shooter. EVER." Gameplay always involves two teams facing off against each other, but there are multiple game types to play. Note that in order to use it, you will also need to download and install Wolfenstein: Enemy Territory. Operating System: Windows, Linux, OS X
Set in the year 2084, this strategy game requires players to defend earth from an invading alien army. According to the website, it "combines military realism with hard science-fiction and the weirdness of an alien invasion." Operating System: Windows, Linux, OS X.
Based on the old DOS game Stunts, Ultimate Stunts is a car racing game that requires players to go through loops and corkscrews, jump over bridges and complete other hair-raising feats. This version also includes a track editor and multiplayer support. Operating System: Windows, Linux, OS X.
Ultrastar Deluxe is an open source karaoke game similar to SingStar. Up to twelve people can sing along at once. It includes more than 10,000 songs and you can also use it with music you already own or create your own songs. Operating System: Windows, Linux, OS X.
Rather than focusing on battles, this 2D real-time strategy game focuses on building a solid economy. Players become more powerful by implementing a wise tax strategy and trading with other cities. Operating System: Windows, Linux, OS X.
A Tremulous fork, Unvanquished also blends a first-person shooter with a real-time strategy game. It has a huge team of international developers who publish updates very regularly. Operating System: Windows, Linux, OS X
742. VDrift
This driving game attempts to simulate the physics of drift racing. The tracks and cars are based on ones you can find in the real world. Operating System: Windows, Linux, OS X.
Another 3D space simulator, Vega Strike invites players to trade, explore and fight in outer space. It also serves as the foundation for several related games, including Privateer Gemini Gold, Vega Trek and Pi Armada. Operating System: Windows, Linux, OS X.
744. VoltAir
The Fun Propulsion Labs at Google developed this Android app in order to show off the capabilities of their Liquid Fun technology. It's a colorful platform game with modern graphics and very happy music that can be downloaded from Google Play. Operating System: Android.
745. Warsow
More cartoonish than most other first-person shooters, Warsow pits rocketlaucher-wielding pigs against cyberpunks with laser guns. The action is fast paced with minimal gore, making it suitable for a wide range of ages. Operating System: Windows, Linux, OS X.
Humankind has been nearly annihilated by nuclear missiles. Can you rebuild the world while keeping your enemies at bay? It includes an extensive technology tree and both single- and multi-player modes. Operating System: Windows, Linux, OS X.
747. Widelands
Designed to be similar to Settlers II, Widelands is another civilization-building real-time strategy game. It's different from some similar games because it requires the player to develop a good system of roads and it allows the player to delegate and issue broad commands rather than instructing each citizen in what to do. Operating System: Windows, Linux, OS X.
Called the "best multiplayer game ever" by one reviewer, this version of Wolfenstein is a face-off between the Axis and the Allies in World War II. It supports up to 32 players at once in multiplayer mode. Operating System: Windows, Linux, OS X
Based on the work of the cartoonist ENTE, Padman is a colorful, award-winning multiplayer game. It offers 23 maps and supports seven different game types. Operating System: Windows, Linux.
750. XMoto
Ride your motocross bike through a 2D landscape, collecting strawberries while avoiding the spiky "wreckers." It includes a level editor, and many players have contributed new levels that you can download from the website. Operating System: Windows, Linux, OS X.
751. Xonotic
A fork of classic Nexuiz, Xonotic offers 25 different weapons, 25 official maps (plus many more made by other players), integrated statistics, a heads-up display and more. It's fun, fast-paced and addictive. Operating System: Windows, Linux, OS X.
Designed to showcase the capabilities of the Blender 3D animation suite, this game features graphics that are way above average for an open source game. It's a few years old now, but still well worth checking out. Operating System: Windows, Linux, OS X.
753. Zaz
Shoot the balls so that three of the same color are together, and then they will disappear. It's an older game but still functional. Operating System: Windows, Linux, Android.
Blending a first-person shooter with a tank game, Zero Ballistics offers unique gameplay set in the alps of Central Europe. It offers three different gameplay modes, six different skill levels and a variety of weapons. Operating System: Windows, Linux, OS X.
755. Zero-K
"Massive robot armies fight an endless conflict" in this real-time strategy game. It includes more than 100 different kinds of units with realistic physics and a streamlined economic system. Operating System: Windows, Linux.

Gateway Security Appliance

Downloaded more than 1.4 million times, the community version of Endian can turn a standard x86 system into a Linux-based UTM solution. The community version is designed for home users, but the company also sells business-class products that are based on the same technology. Operating System: Linux
757. Untangle
The Untangle NG Firewall offers a wide range of security functions including content filtering, web caching, policy enforcement, traffic inspection and reporting. Untangle also sells a supported version of its product and related solutions for various industries. Operating System: Windows, Linux

Genealogy

758. Gramps
Short for "Genealogical Research and Analysis Management Programming System," Gramps has one of the best acronyms we've ever seen on an open source project. It's a professional-quality genealogical program with a very active user community and more than 1,100 pages of online documentation to help you trace your own family history. Operating System: Windows, Linux, OS X

Geography/Mapping

759. Marble
This "virtual globe" goes far beyond basic mapping, integrating weather, photos, traffic and Wikipedia information. With the mobile versions (currently only for select Nokia phones, an Android version is in the works), it also becomes a turn-by-turn navigation system. Operating System: Windows, Linux, OS X
760. OpenLayers
This alternative to Google Maps and Bing Maps provides free APIs that can put dynamic, JavaScript-based maps on any website. It's sponsored by the Open Source Geospatial Foundation. Operating System: OS Independent
761. WorldWind
Very similar to Google Earth, this NASA-developed tool lets you view satellite imagery and maps for any location on earth. It also includes an API for developers who want to include WorldWind functionality within their own apps. Operating System: OS Independent

GPU

762. MIAOW
MIAOW (pronounced "me-ow") is the world's first open source GPU. It was created by a team led by Professor Karu Sankaralingam at the University of Wisconsin-Madison as an academic project, and it has interesting implications for open source hardware in the future. Operating System: OS Independent

Graphics Editors/Animation Tools

763. Alchemy
Designed to help artists get their creative juices flowing, Alchemy has a deliberately limited feature set--no undo, no selecting, no editing. Art teachers can use it as a starting point to help students "sketch" new ideas before going on to create finished pieces of art using real-world media or more advanced applications. Operating System: Windows, Linux, OS X
While not quite as advanced as Blender, Art of Illusion is another good option for 3D animation. Highlighted features include "subdivision surface-based modelling tools, skeleton-based animation, and a graphical language for designing procedural textures and materials." Operating System: OS Independent.
765. Blender
Blender is a free, professional-quality 3D animation tool that has been used to create feature-length movies and video games. Paid educational materials and a cloud version are available. Operating System: Windows, Linux, OS X
766. CinePaint
Although it is a raster graphics editor, not a video editor, CinePaint is specifically designed to be used for motion pictures. It offers a similar set of tools as Gimp, but it supports high bit-depth, which allows this app to be used for touching up individual frames of a film. Operating System: Windows, Linux, OS X
767. Dia
If you need to create an org chart or similar diagram, Dia is a free, easy-to-use tool that gets the job done. It includes special objects for flowcharts, UML diagrams and network diagrams, making it useful for many who work in IT. Operating System: Windows, Linux
768. Gimp
Short for GNU Image Manipulation Program, Gimp is a full-featured, professional-caliber photo editing program. Its capabilities are very similar to those of Adobe Photoshop. Operating System: Windows, Linux, OS X
769. Gmsh
This app describes itself as a "3D finite element grid generator with a build-in CAD engine and post-processor." In layman's terms, it's a simple program for designing three-dimensional objects that offers some capabilities of a 3D graphics tool and some capabilities of a CAD tool. Operating System: Windows, Linux
770. GrafX2
Originally created for DOS systems, this app traces its inspiration to programs like Amiga's Deluxe Paint and Brilliance. This updated open source version has been ported for multiple operating systems, but it's still best at creating old-school 256-color graphics. Operating System: Windows, Linux, OS X
771. Inkscape
Another professional-quality tool, Inkscape is a vector graphics program that rivals Adobe Illustrator and Corel Draw. Key features include multiple drawing tools, shape tools, text tools, cloning, transformations, grouping, layers, fills, node editing, path simplification and much more. Operating System: Windows, Linux, OS X
772. K-3D
This open source 3D animation tool aims to be easy-to-use, powerful and flexible. It boasts a plug-in based pipeline architecture, procedural and parametric workflows, a node-based visualization pipeline, an advanced undo/redo system and standards support. Operating System: Windows, Linux, OS X.
773. Krita
KDE's painting app can help you edit existing photography or art or create new digital artwork of your own. The interface is designed to mimic real world art supplies and painting tools. Operating System: Windows, Linux
774. LaTeXDraw
This simple drawing program creates images for use in documents created with LaTeX. It's best for mathematical or scientific images, charts, diagrams, etc. Operating System: OS Independent
This project provides a workflow for high dynamic range (HDR) images. It supports multiple file formats, including raw formats, and it includes helpful wizards that walk users through common tasks. Operating System: Windows, Linux, OS X
776. Pixelitor
This Java-based photo editor offers more than 70 image filters and color adjustments, some of which aren't offered by any other tool. However, documentation for this project is a little light, so you'll need to have some experience with other photo editors in order to use it. Operating System: OS Independent
777. Pinta
Modeled after the freeware Paint.Net, Pinta offers advanced drawing tools and more than 35 adjustments and effects for manipulating your photos. Features include unlimited layers, full undo history and more. Operating System: Windows
Synfig Studio offers "powerful, industrial-strength" 2D animation software. It allows users to create film-quality work without having to draw each frame by hand. Operating System: Windows, Linux, OS X.
779. Wings 3D
Wings 3D creates still graphics, but not animation. Designed to be both powerful and easy to use, it offers a wide range of modeling tools, a customizable interface, support for lights and materials, and a built-in AutoUV mapping facility. Operating System: Windows, Linux, OS X

Healthcare Integration Engine

Mirth Connect describes itself as the "Swiss Army knife of healthcare integration engines" and promises support for numerous healthcare data standards, including HL7. Commercial support is available. Operating System: Windows, Linux, OS X

Hospital Information System

781. Care2x
Key features of this hospital information system include smart search, smart data validation, quick lists, one-key shortcuts and more. Check out the demo on the website to see it in action. Operating System: Windows, Linux, OS X
Designed for healthcare facilities with limited resources, this hospital information system has been implemented extensively in Africa. It supports multiple languages, and it integrates with Central African health insurance billing tools. Operating System: Windows, Linux

Human Resource Management (HRM)

783. OrangeHRM
With 3 million users, OrangeHRM claims to be the "world's most popular open source HR software." In addition to the open source version, it comes in profession and enterprise versions for on-premise deployment, and a Live version that runs in the cloud. Operating System: Windows, Linux, OS X.
784. WaypointHR
WaypointHR software is available as an open source download or in a cloud version, which offers additional features. It places the emphasis on security and ease of use while tracking employee demographic information and employment records. Operating System: OS Independent.

Humanitarian Efforts

The International Rescue Committee (IRC) built this monitoring system to make sure that goods donated to humanitarian efforts, like medical supplies shipped to Syria, actually reach their intended recipients. It is said to be the first digital tool of its kind. Operating System: OS Independent

Internet of Things (IoT)

786. Arduino
One of the best-known names among open source IoT projects, Arduino is a platform that encompasses both hardware and software. The software includes an integrated development environment (IDE) for writing code in the Arduino language.
Sold by Arduino's sister organization Genuino, this open source board includes two separate processors: the ATmega32u4 microcontroller that runs Arduino and the Atheros AR9331 that runs a specialized Linux distribution called OpenWrt-Yun. It includes 16 MB of Flash memory, 64 MB RAM, Ethernet, WiFI, USB and a Micro-SD card reader.
This organization offers several different open-source boards, all of which are about the size of a credit card. Their flagship product, the BeagleBone Black promises that users will be able to boot Linux in under 10 seconds and get started with development projects in less than 5 minutes. Their boards can run Linux or Android.
This Microsoft Open Technologies project makes it possible to connect IoT devices and sensors to the Microsoft Azure cloud. It includes a variety of code samples and guides, including a sample end-to-end weather alert solution that uses an Arduino board, a Raspberry Pi and several Azure services. Operating System: Windows, Linux.
790. DeviceHive
DeviceHive is a machine-to-machine (M2M) communication framework for smart energy, home automation, remote sensing, telemetry, remote control and monitoring software and other IoT applications. It supports Java, C++, .NET, Python, Javascript, and other platforms.
This project aims to be "the go-to platform for makers" and "the universal interface for Internet of Things and M2M." It includes tools for data gathering and analysis, remote control and event-based alerting, and it allows users to control many different devices from a single dashboard. Paid enterprise versions and support are available.
The Eclipse Foundation has a long list of IoT-related projects that include standards and development frameworks. The project also offers a wealth of videos, tutorials, sandboxes and other tools to help new IoT developers get started on their first projects.
Although it's still a beta release, this iot.eclipse.org project seems very promising. It aims to build a flexible, open framework for connecting smart devices in living spaces. Operating System: Windows, Linux, OS X.
This unusual project makes it possible to create your own small, internet-connected printer. Want to talk to the project owners? You can send a message or draw a picture that will be printed on the Exciting Printer in their office.
795. Flutter
Designed for hobbyists, students and engineers, Flutter offers a fast ARM processor and long-range wireless communication. It also includes built-in battery charging capabilities and a built-in security chip. It runs Arduino, and prices start at $36 for the basic model.
796. Freeboard
This project promises "ridiculously simple dashboards for your devices." It offers a widget-based, drag-and-drop development tool that makes it easy to track the data from your IoT devices. Both free and paid plans are available. Operating system: OS Independent
While many IoT boards rely on ARM processors, Intel also offers a IoT development board known as Galileo. It's Arduino-compatible and boasts a wider range of ports than most similar boards.
798. IoTivity
Sponsored by the Open Interconnect Consortium, The IoTivity software allows for device-to-device connectivity. It is an implementation of the OIC's standard specification. Operating System: Linux, Arduino, Tizen
This toolkit includes a smart object API gateway service reference implementation, an HTTP- to-CoAP semantic mapping proxy, gateway-as-a-service deployment, application framework, embedded software agents, semantic discovery and linkage, linked data compatibility, tools for multiple sensor net clients, and Raspberry Pi and cloud micro-instance deployment images. The project also sponsors a meetup group in Silicon Valley.
800. Kaa
Focused on speeding IoT projects, Kaa describes itself as "a production-ready, multi-purpose middleware platform for building complete end-to-end IoT solutions, connected applications, and smart products." It enables communication and monitoring between IoT devices and back-end infrastructure, and it can be easily deployed on Amazon's cloud. Operating System: Linux
801. KinomaJS
This JavaScript-based application framework helps developers build IoT apps for embedded and mobile devices. It also includes an XML programming interface. Operating System: Windows, Linux, OS X
Part of IBM's developerWorks Open effort, libsecurity is a set of security modules that can be used by IoT application developers. It includes tools for secure storage, authentication, and more. Operating System: OS Independent
Working with the AllSeen Alliance, Local Motors has developed a Rally Car, which they are using as the platform for their Connected Car project. The open source design includes an automotive grade Linux distribution, a Raspberry Pi board, several Arduino relay boards, and Octoblu open source software.
804. Mango
Mango automation software offers features like data acquisition, real-time monitoring, a high-performance NoSQL database, security and much more. It is available in both a free open source version and paid enterprise versions. Operating System: Windows, Linux, OS X
805. Microduino
Microduino offers a range of extremely small boards that are about the size of a quarter and start at just $8. They are currently taking orders for their new mCookie modules which stack like Lego blocks. A variety of extension boards and application kits are also available for purchase on the website.
806. Nimbits
Nimbits describes itself as "a Data Logging Service and Rule Engine Platform for connecting people, sensors and software to the cloud and one another." It includes server software, an open source Java library, an Android client and a public cloud that runs Nimbits Server.
807. OpenADC
Sold by a company called NewAE Technology, OpenADC is an open source hardware platform with an emphasis on hardware security. The company is also behind the CHipWhisperer hardware security project and offers hardware security training.
808. OpenHAB
From Fragmentation to Connection
Download Now
This Java-based open source home automation software promises a vendor-agnostic way to control all the IoT devices in your home through a single interface. It allows users to set up their own rules and control their home environment. You can download the software from the site or use it through the my.openHAB cloud service. Operating System: Windows, Linux, OS X, Android
809. OpenIoT
Funded in part by the EU, OpenIoT describes itself as a "blueprint middleware infrastructure for implementing/integrating Internet-of-Things solutions." The project's goals are to be able to collect and process data from nearly any IoT device, stream that data to the cloud and analyze and visualize the collected data. Operating System: Windows, Linux, OS X
810. OpenMote
OpenMote offers three different boards: Open-Mote-CC2538, OpenBase and OpenBattery. They can be purchased separately or in kits for complete IoT deployments.
OpenPicus offers several different open source system on a module (SoM) boards, all of which come with the company's free IDE. You can choose from three different kinds of connectivity—Wi-Fi, GPRS or Ethernet. Modules start at €35.
812. OpenRemote
This award-winning project boasts users like Philips, Trust Digital Lifestyle Accessories, Ooma, VolkerWessels and others. Free and paid versions are available.
813. OpenPicus
OpenPicus offers both hardware and software for IoT development. Its free libraries allow users to connect to any cloud computing service. Operating System: Windows
814. OpenWSN
OpenWSN is the repository for IoT hardware and software projects underway at the University of California Berkeley. Its ultimate goal is to provide a complete standards-based open source IoT stack.
815. Particle
Formerly known as Spark, Particle is a full suite of hardware and software for building IoT devices, applications and services. Particle boards start at just $19, and the software is available on GitHub
816. Pinoccio
This company sells very small wireless boards that it calls Scouts. Connect your Scouts together into a mesh network called a Troup and then connect the Lead Scout to the Web. Compatible with Arduino.
817. RasWIK
Ciseco (not to be confused with Cisco) offers a Raspberry Pi Wireless Inventors Kit, or RasWIK. It promises that you "can build wireless devices in just a matter of minutes," and it comes with 29 projects for you to try. Prices for the kit start at £49.99.
818. SiteWhere
SiteWhere aims to help companies build scalable IoT applications and speed their time-to-market with new products and services. It integrates with MongoDB, HBase, Hortonworks, Clouder, Apache Solr and Twilio, and it supports deployment on nearly any cloud computing platform.
819. SODAQ
SODAQ, which stands for "Solar-Powered Data Acquisition," offers Arduino-compatible boards that are easy to connect together. The organization's newest offering is called the Mbili (which means "two" in Swahili), and it includes the Atmel ATmega 1284P microcontroller. It's a low-power board that can run on solar energy.
820. Tessel
This open source IoT hardware platform features a modular design that makes prototyping easy. The Tessel 2, which begins shipping in September, costs just $35 and is compatible with Node.js for fast development. Available modules include Accelerometer, Ambient, Relay, Climate, Infrared, Servo, RFID, GPS, MicroSD, Camera, Audio, Lights, Keypad, Motors, Pulse and more.
The Thing System's website says, "Today, you have to fight your things. They don't talk to each other, the apps don't work, it's a tower of babel. Our solution — the Thing System — is open source. We'll talk to anything, you can hack the system, it has an open API." It supports a huge list of IoT devices, including those made by Cube Sensors, Parrot, Next, Oregon Scientific, Samsung, Telldus, Aeon Labs, Insteon, Roku, Google, Apple and other manufacturers. Operating System: Windows, Linux, OS X, others
822. ThingSpeak
This IoT application and API makes it possible to collect and process data from remote devices. Key features include real-time data collection, geolocation data support, data processing, data visualizations and device status messages.
823. UDOO
Udoo offers several different open source boards that can run Android, Arduino and the UDOObuntu distribution of Linux, as well as some other operating systems. Prices for boards start at $99, or you can use the provided specs to build your own.
824. Webinos
Webinos is a web-based application platform for the internet of things. Its goal is to enable developers to write applications that run on any device, including IoT devices, cars, TVs and smartphones.
825. WeIO
This group wants to make creating Internet-connected objects as easy as creating websites. Its award-winning devices support HTML5 and Python, and prices start at $69.
Last year, Microsoft released much of the code for its IoT program on GitHub. It's a collection of tools and templates for programming small devices and connecting them to Azure services. Operating System: Windows, Linux.
827. WIZnet
WIZnet makes chips and IoT boards based on those chips. The link above includes details and specifications for its open source hardware products.
828. Zetta
Based on Node.js, Zetta can create IoT servers that link to various devices and sensors. The website includes a page devoted to projects built with betta that includes a car speed tracker and home security systems.

Interior Design

Determined to spruce up your home this year? This app helps you create 2D and 3D layouts of your rooms, complete with a preview of how the finished product will look. Operating System: Windows, Linux, OS X

IT Inventory Management

830. GLPI
Many users deploy OCS (see below) and GLPI together. OCS finds the resources connected to the network, and GLPI creates a database to help administrators track and manage those assets. Operating System: OS Independent
Many IT departments use OCS Inventory NG to track their on-site hardware, and now the tool offers agents for Android and Windows mobile devices as well. It detects active devices on the network and provides information about the type of device and installed apps. Operating System: Windows, Linux, OS X, Android, Windows Phone

Jewelry

832. iNecklace
This necklace for Mac fans slowly pulses with light. You can buy it premade or download the open source schematics from GitHub to make it yourself. Operating System: N/A

Job Scheduler

833. Aurora
This Apache Incubator project schedules jobs to run on clusters of machines that are being managed by Apache Mesos. Twitter is a key contributor to the project. Operating System: Windows, Linux, OS X
834. Fenzo
This Java library helps schedule Apache Mesos jobs. Developed by Netflix, it is highly scalable and allows users to set a wide variety of criteria for job scheduling. Operating System: Windows, Linux, OS X
835. Salene
Developed by LinkedIn, Selene is an iOS library for scheduling background tasks in iPhone and iPad apps. It allows the developer to set the priority and average response time for how often tasks should be completed. Operating System: iOS

Laboratory Information Management System (LIMS)

836. Bika LIMS
Bika is a Zulu word that means "report, from clan to clan, bring news of weddings, births, festivals and funerals." This project is a full-featured LIMS that boasts global status tracking, easy use, an integrated content management system, and live search. Commercial support is available. Operating System: Windows, Linux, OS X

Library

837. Evergreen
This library automation solution prides itself on its scalability. The Evergreen community is unusually active, with regular newsletters and updates, and you can find demos of the software and an interactive of libraries using Evergreen at the website. Operating System: OS Independent.
Used by thousands of libraries around the world, Koha describes itself as "the most advanced and cost effective open source automation solution on the market." Paid hosting, support, consulting, implementation and development services are also available on the site. Operating System: OS Independent.
839. NewGenLib
NewGenLib proudly proclaims itself the "best open source library system." Notable features include support for Android smartphones and tablets, standards compliance, an intuitive interface and much more. Operating System: OS Independent.
840. OPALS
Short for "OPen-source Automated Library System," OPALS is one of the most highly rated library automation solutions available. It provides Web-based access to information databases, library collections and digital archives. Paid hosting and other services are available. Operating System: OS Independent.
841. OpenBiblio
OpenBiblio features include an online public access catalog (OPAC), circulation, cataloging, and staff administration. See the site for extensive documentation and templates. Operating System: OS Independent.
842. VuFind
This library management system boasts Web 2.0 capabilities and design done "by libraries for libraries." The modular architecture means it's easy to install just the features you need--or to add or modify modules as necessary. Operating System: OS Independent.

Log File Monitoring and Analysis

843. AWStats
This free log file analysis tool creates graphs from Web, streaming, ftp or mail server statistics. Check out the helpful comparison chart to see how its feature stack up against other open source and commercial applications. Operating System: Windows, Linux, OS X
844. Webalizer
This speedy Web log file analyzer claims to be able to process a log file with 2 million hits in 30 seconds. It supports both IPv4 and IPv6, and it is available in dozens of languages. Operating System: Windows, Linux, OS X

Logic/Debate

845. Argunet
Argunet offers both an argument editor (similar to Argumentative) and a library of arguments that students can browse and analyze. You can use it on a standalone system or in a client-server setup to encourage collaboration among students or debate teams. Operating System: Windows, Linux, OS X.
846. iLogos
Java-based iLogos isn't quite as fancy as some of the other argument mappers, but it does make it fairly easy to diagram arguments with a combination of words and pictures. The site also includes a helpful list of similar tools. Operating System: Windows, Linux, OS X.

Machine Learning

847. FeaturFu
LinkedIn released this project. According to the company it is "a new open source toolkit designed to enable creative and agile feature engineering for most machine learning tasks such as statistical modeling (classification, clustering, and regression) and rule-based decision engines." Operating System: Linux
848. Hivemall
Hivemall is a collection of machine learning algorithms for Hive. It includes highly scalable algorithms for classification, regression, recommendation, k-nearest neighbor, anomaly detection and feature hashing. Operating System: OS Independent.
849. Oryx
Sponsored by Cloudera, Oryx brings predictive analytics and machine learning to Hadoop. There is also an Oryx 2 project that uses Spark and supports lambda architecture. Operating System: OS Independent.
In February this year, Salesforce bought PredictionIO, and then in July, it contributed the platform and its trademark to the Apache Foundation, which accepted it as an incubator project. So while Salesforce is using PredictionIO technology to advance its own machine learning capabilities, work will also continue on the open source version. It helps users create predictive engines with machine learning capabilities that can be used to deploy Web services that respond to dynamic queries in real time. Operating System: Linux

Mail Servers

851. Citadel
Built with a "room" architecture, Citadel promises easy installation and versatility. In addition to standard groupware features, it includes forums, instant messaging, a wiki, a blog engine and more. Operating System: Linux
852. Exim
This MTA was developed at the University of Cambridge and is still widely used in the UK. It's best for servers that are unlikely to have large volumes of mail because it doesn't have a central queue manager. Operating System: Linux, Unix
853. Postfix
Originally developed by IBM Research, Postfix is a secure mail transfer agent that is very similar to Sendmail (see below). It's fairly fast and can handle a large volume of mail. Operating System: Linux, Unix, OS X, Solaris
854. Scalix
Aimed at hosting providers and ISPs as well as enterprises and small businesses, Scalix offers an alternative to Microsoft Exchange servers for group e-mail and calendaring. It comes in numerous flavors, including the community, enterprise, small business and hosting editions. Operating System: Linux
855. Sendmail
While it's not as widely used as it once was, Sendmail continues to be a very popular mail transfer agent. Newer features include support for filters, authentication and external database look-ups. Operating System: Linux
856. SOGo
SOGo is a groupware server that allows users to access e-mail and shared calendar data via the Web, mobile devices, or an e-mail client like Thunderbird. The latest version adds native Outlook support. Operating System: OS Independent
857. Zentyal
Designed as an alternative to Microsoft Exchange, Zentyal is a business mail server that runs on Linux. It's compatible with Exchange and Active Directory, and it can sync with mobile devices. It also incorporates some security features like antivirus, antispam and firewall capabilities, and it supports file sharing and printer management for Windows environments.
The free, open source version of the software is called the Server Development Edition. It also comes in a cloud version that starts at 1€ per user per month or in a supported on-premises version that is available for purchase through resellers.
858. Zimbra
Used by more than 500 million people, Zimbra offers a range of email and messaging tools for companies of all sizes, and it comes in both free and paid versions. Its browser-based interface was "built for the cloud, both public and private." Operating System: Linux, Unix, OS X.

Marketing

Currently in private beta testing, CampaignChain aims to give marketers an integrated view of all their campaign activities across various channels. Interested users can download the software or sign up to be part of the service trial and receive a discount when the paid service goes live. Operating System: OS Independent.
860. Mautic
Mautic combines tools for social media marketing, lead management and email marketing in one unified platform that includes the abilities to create campaigns and run reports. It's available as an open source download or as a hosted service. Operating System: OS Independent.
Open Source Marketing isn't so much an application as a methodology and platform for applying open source principles to the discipline of marketing. It allows all kinds of organizations to share marketing intelligence and reuse the core processes developed by the organization behind the project. That organization also sells related services and training. Operating System: N/A
862. Pimcore
This multi-function tool is primarily a Web content management and ecommerce solution that also has marketing automation features. It includes SEO, email marketing, social media, analytics and testing capabilities. Paid support and enterprise add-ons are available. Operating System: OS Independent.

Math

863. Dr. Geo
This award-winning app invites people age 7 to 77 to "be a geometer." It allows students to create and interact with sketches of geometric objects so that they can better understand geometry lessons. Operating System: Windows, Linux, OS X
864. Genius
Genius is another multifunctional math program with the ability to do calculus, number theory, statistics, trigonometric functions, modular arithmetic, 2D and 3D plots, and more. It has its own syntax for inputting expressions and functions, but it is easy to learn. Operating System: Linux, OS X
865. GeoGebra
With its wide range of capabilities, GeoGebra is suitable for elementary students learning arithmetic, high school students learning algebra and geometry, and even for college students studying calculus and advanced mathematics. Specifically designed as an educational tool, it is much more user-friendly than many of the other math apps on our list, and the website also includes helpful resources for educators. Operating System: OS Independent
866. gnuplot
Unlike many of the other math apps on our list, Gnuplot does just one thing--create graphs. It works from the command line and supports both 2D and 3D plots. Operating System: Windows, Linux, Unix, OS X, and others
867. Kig
Similar to Dr. Geo, KDE's geometry app also provides an interface for working with and learning more about geometric figures. (Note that in order to use Kig on Windows, you'll have to download KDE for Windows.) Operating System: Windows, Linux
If you're geeky enough to know what a Mandelbulb is, you might enjoy this app which renders 3D fractals. More information about the app can also be found on the FractalForums site. Operating System: Windows, Linux
869. Maxima
Descended from a program first developed in the 1960s, Maxima can handle differentiation, integration, Taylor series, Laplace transforms, ordinary differential equations, systems of linear equations, polynomials, sets, lists, vectors, matrices and tensors. It can also create 2D and 3D plots. Operating System: Windows, Linux, OS X.
870. SageMath
This suite combines more than 100 separate open source mathematics tools and provides a unified interface. Note that to use it you will need to have some basic programming skills. Operating System: Windows, Linux, OS X
871. Scilab
Used by many educational institutions, Scilab can do math computations, data analysis, visualizations, optimization, statistics and more. Paid support, training and services are available through Scilab Enterprises. Operating System: Windows, Linux, OS X

Medical Imaging

872. 3D Slicer
This app offers DICOM file viewing, interactive segmentation, volume rendering and other capabilities. It can work with images from MRI, CT, US, nuclear medicine, and microscopy. Operating System: Windows, Linux, OS X
873. AMIDE
AMIDE stands for "Amide's a Medical Imaging Data Examiner." Key features include slice viewing of a data set, zooming, support for various color maps, anisotropic filtering wizard, generation of fly-through movies and more. Operating System: Windows, Linux, OS X
874. ANTS
Short for "Advanced Normalization Tools," this project helps doctors and researchers make maps of brains. Features include "multivariate similarity metrics, landmark guidance, the ability to use label images to guide the mapping and both greedy and space-time optimal implementations of diffeomorphisms." Operating System: Windows, Linux, OS X
875. BioImageXD
Used by biologists and other scientists, as well as health care experts, BioImageXD offers provides analysis, processing and visualization of multi-dimensional images obtained with a microscope. It can create 3D (and 4D) renderings and includes batch processing capabilities. Operating System: Windows, Linux, OS X
876. dcm4che
This collection of Java-based apps makes it possible to store, view and work with DICOM images. It includes both server tools and a Web-based interface for accessing stored files. Operating System: Windows, Linux, OS X
877. ImageJ
Developed at the National Institutes of Health, this Java-based image manipulation program was intended to for use by doctors and scientists for use in analyzing images from clinical or laboratory settings. However, it can be used to modify many other types of images and artwork as well. Operating System: OS Independent
878. InVesalius
InVesalius describes itself as "a free software for reconstruction of computed tomography and magnetic resonance images." It can import and export to various file formats and perform volume rendering or image segmentation. Operating System: Windows, Linux, OS X
879. MITO
Short for "Medical Imaging Toolkit," MITO can acquire images from a picture archiving and communications system (PACS) and allow radiologists and technicians to view and manipulate them. It supports the DICOM image standard. Operating System: Windows, Linux
880. Orthanc
With Orthanc, healthcare facilities or research organizations can set up a RESTful server for DICOM images. It's lightweight and fast, and it aims to make it easy for developers to write applications accessing the images stored on the server. Operating System: Windows, Linux
881. ODIN
ODIN helps create sequences of magnetic resonance scans. It's easy to use and comes with a number of templates to help users create their own sequences. Operating System: Windows, Linux
882. OsiriX
Downloaded more than 1,000 times every day, OsiriX claims to be "the most widely used DICOM viewer in the world." It boasts fast performance, and it comes in an FDA-approved version. Operating System: OS X, iOS

Microfinance

883. Mifos
Mifos aims to help microfinance institutions do a better job of providing loans to poor people around the world. It's a web-based management information system (MIS) that includes "portfolio and transaction management, on-the-fly financial product creation, in-depth client management, integrated social performance measurement, and a reporting engine." Operating System: OS Independent

Middleware

884. JBoss
Red Hat's JBoss Middleware includes a variety of tools to be lightweight and cloud-friendly, while connecting together, integrating and automating various enterprise applications and systems. Users include Oak Ridge National Laboratory, Nissan, Cisco, CA Technologies, AMD and others. Operating System: Linux.

Mind Mapper

885. FreeMind
Downloaded more than 4,000 times a day, FreeMind is a popular open source tool for brainstorming, taking notes and more. It functions like a virtual white board, making it easier to draw diagrams that show relationships between different concepts and words. Operating System: Windows, Linux, OS X
886. FreePlane
Based on FreeMind, FreePlane is another open source mind mapper. Interestingly, the website offers a mind map created with the software that explains its functionality. Operating System: Windows, Linux, OS X
887. XMind
Ideal for brainstorming and planning sessions, XMind makes it easy to see the connections between ideas—it's sort of like a white board for your computer. In addition to the free version, it comes in a pro version for individuals and an enterprise version for businesses. Operating System: Windows, Linux, OS X.

Mobility Tools

888. Aard 2
With this tool you can access various dictionaries or even Wikipedia offline. Note that you will need to download dictionaries in order for the offline feature to work. Operating System: Android
Want to know how fast your website will load in the real world on a real mobile device? The link above takes you to a hosted version of Mobitest that can answer that question for you. You can also download the source code and create your own testing service. Operating System: OS Independent
890. Amaze
Amaze is a lightweight, attractive file manager for Android. Key features include aMaterial Design-based interface, multiple tabs, navigation drawer, file sharing, app manager, root explorer and more. Operating System: Android
Downloaded more than a million times, this app ports the OpenOffice suite to Android. It can view and edit files and exports documents to Office-compatible formats. Operating System: Android
One of the most customizable keyboards available, AnySoft supports multiple languages. It predicts words based on your typing behavior and supports multi-touch. Operating System: Android
With this tool, you can schedule any app to start at any time. Use Pandora as your alarm clock or creatively remind yourself about upcoming tasks. Operating System: Android
894. Auto-Away
This app sends an automated response to phone callers and people who text you. You can set it up to send the same message to everyone or to blacklist or whitelist certain numbers. Operating System: Android
895. ConnectBot
Need to transfer files securely to and from your mobile device? ConnectBot sets up a secure shell connection for Android devices. Operating System: Android
896. Convertigo
This self-proclaimed "first enterprise grade open source solution" for mobile app development and deployment claims to slash development time and cost by up to 20 percent. In addition to the free community version, it also comes in paid standard and extended editions. Operating System: Windows, Linux, OS X with clients for iOS, Android, Windows Phone and BlackBerry
This note-taking app allows you to write and organize simple text files. It also offers optional encryption capabilities. Operating System: Android
898. Crushr
Simplify your smartphone home screen with this to-do list widget. It's very simple and easy to use. Operating System: Android
Miss your old-fashioned Dictaphone? This app lets users leave themselves short audio messages for review later. Operating System: Android
Need to post an article or blog to your Drupal-based website? This tool lets you write and upload text from your mobile device. Note that you'll need Drupal in order to use it. Source code is available through GitHub. Operating System: Android
901. Easy Token
Use your Android device as an authentication token. This app is compatible with RSA SecurID and supports SDTID files. Operating System: Android
902. F-Droid
F-Droid is a catalog of free and open source mobile apps that users can install directly from this app. It's a little bit like having an open source app store. Operating System: Android
903. ForgeRock
ForgeRock offers a unified identity and access management platform that works with mobile devices. Users can choose the free open source version or the subscription edition that adds more features. Operating System: Linux
904. FreeOTP
Created by Red Hat, FreeOTP generates one-time use passwords that add extra security to corporate accounts or online services like Google, Evernote, GitHub and others. It makes it much more difficult to hack your password. Operating System: Android
905. IP Pro
This app identifies your IP address, tests Internet connectivity and checks to see if your VPN is functioning. It also shows your location in Maps. Operating System: Android
This app ports two of the most popular open source graphics editors—GIMP and Inkscape—to Android. However, users should be aware that this app is extremely large, and it is difficult to do quality graphics editing on most mobile devices unless you have a stylus and/or a very large screen. Operating System: Android
907. Inkspace
This app creates one-of-a-kind 3D art that becomes an animated gif. Simply draw on the screen with your finger then tilt your phone to move your drawing in 3D. Operating System: Android
908. Landmarker
Featured on the Android Experiments website, this app allows users to point their phone at the landscape around them and see the name of key landmarks. It also integrates with Google Maps so that users can get directions to places they are seeing from far away. Operating System: Android
With this tool, you can keep track of items purchased and then later export them to a spreadsheet or personal finance software, or email them. It can also track group expenses if you need a tool for keeping track of whose turn it is to pay for lunch. Operating System: OS Independent
910. QuincyKit
This tool tracks crash reports in a database so that developers can see what problems their apps are experiencing in the wild. It automatically groups similar incidents together, and it can alert users when bugs have been fixed. Operating System: OS X, iOS
911. SmartNavi
Turn-by-turn directions are great, but relying on GPS all the time can eat up battery life. SmartNavi relies on internal sensors instead of GPS to provide directions. Note that it can be used only while walking, not while driving. Operating System: Android
WSO2 provides a comprehensive platform for managing BYOD or corporate-owned mobile devices that run iOS, Android or Windows. It includes tools for mobile device management (MDM), mobile app management and device and data security. Operating System: Windows, Linux, Solaris

Modeling

913. ArgoUML
Downloaded more than 80,000 times, ArgoUML claims to be "the leading open source UML modeling tool." It is useful for creating class, statechart, activity, use case, collaboration, deployment or sequence diagrams. Operating System: OS Independent
914. StarUML
Designed as an alternative to Rational Rose and other commercial modeling tools, StarUML supports both the latest UML standards and Model Driven Architecture (MDA). It's very user-friendly and features a plug-in architecture. Operating System: Windows
915. Modelio
The code behind Modelio has actually been in development for more than 20 years, but parent company Modeliosoft just recently released it under an open source license. It offers a UML modeler, BPMN support, Java code generator, and support for XML, HTML and Jython. Operating System: Windows, Linux

Multimedia Tools

916. Ampache
This audio video streaming application and file manager allows users to set up a streaming server so that they can access their music and movies from any device. There is a demo server on the website so that you can see it in action. Operating System: Windows, Linux, OS X.
917. AmpJuke
AmpJuke is a streaming music server that allows clients to connect via the Internet or a LAN. Key features include easy installation, last.fm integration, artist biography retrieval, tagging, transcoding and more. Operating System: Windows, Linux, OS X.
918. AVStoDVD
As the name suggests, this tool converts AV video files to DVD-compatible formats and burns them onto playable DVDs. It includes a DVD menu editor and a video and audio editor. Operating System: Windows.
919. Banshee
Similar to iTunes, Banshee allows users to browse, buy, download, organize and play audio and video files. It can sync with iOS and Android devices, and it includes features like queuing, smart shuffle, cover art, smart search, playlists and more. Operating System: Windows, Linux, OS X, Android, iOS.
920. Bino
The feature that sets Bino apart is its support for stereoscopic 3D video and multi-display video. It can even handle some types of virtual reality display. Operating System: Windows, Linux, OS X.
921. Burn
Burn offers a simple interface and advanced options for burning CDs or DVDs with your Mac. It can create audio CDs, DVDs, DVD-audio discs, DivX discs, MP3 discs and more. Operating System: OS X.
922. CamStudio
There's no need to spend hundreds of dollars on screen video capture software when CamStudio can do the same thing for free. It records all on-screen and audio activity and creates AVI files. Operating System: Windows.
Originally created by Apple but now supported by an open source community, the Darwin Streaming Server can stream QuickTime and MPEG-4 files. As you might expect, it is primarily targeted at Mac users although it does also run on other platforms. Operating System: Windows, Linux, OS X.
924. Data Crow
Made for highly organized people (or those who want to be), this "ultimate media cataloger and media organizer" manages both physical and digital copies of stuff—music, software, games, movies, photos, books, or any other kind of collection. It also includes a loan administration feature that lets you keep track of friends who have borrowed your things. Operating System: OS Independent.
925. DVDStyler
This tool not only burns discs, it can also help you create interactive DVD menus or photo slideshows. It supports a wide variety of multimedia file formats. Operating System: Windows, Linux, OS X.
926. ExMPlayer
And this is another MPlayer GUI. It offers thumbnail seeking, and the latest version has a new Movie Animator tool that allows users to turn clips into animated GIFs. Operating system: Windows, Linux.
927. FFmpeg
FFmpeg humbly describes itself as "the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created." It's a command-line tool that has been integrated into many other open source projects. Operating System: Windows, Linux, OS X.
For Windows users only, InfraRecorder burns CDs and DVDs, and it can also blank rewritable discs, fixate discs and create copies. It integrates with Windows Explorer, which makes it very easy to use. Operating System: Windows.
929. JuceVLC
A fork of the VLC Media Player, JuceVLC provides a full-screen interface that makes the system seem more like a media center. It's lightweight and provides an interface that is meant to be used with a wireless mouse while you're sitting on your couch. Operating System: Windows, Linux, OS X, others.
930. Kodi
Formerly known as XBMC, Kodi is an award-winning open source tool that turns your system into a media center. It plays music, movies and TV; records live TV like a DVR; organizes all your media files (including photos); and allows you to use a smartphone or tablet like a remote control. Operating System: Windows, Linux, OS X, Android, iOS.
931. kPlaylist
kPlaylist leverages PHP and MySQL to create a streaming music server that lets users (and their friends) access their audio files from anywhere. Screenshots and a demo on the site allow you to see how it works before you download. Operating System: Windows, Linux.
Krut is similar to CamStudio, but it is cross-platform and records WAV and MOV files instead of AVI files. It also offers a timer-controlled recording option. Operating System: Windows, Linux, OS X.
This conversion tool supports AVI, WMV, MKV, RM, MOV and other formats. It includes helpful presets that will meet the needs of most users, or you can tinker with the advanced settings. Operating System: OS X.
Extremely lightweight, MPC-HC is a great option for playing video on older or underpowered Windows systems. The look and feel are similar to the classic Windows Media Player. Operating System: Windows.
Very similar to Kodi, MediaPortal is another option for turning a PC into a home media center. It can play TV, DVDs, music, streaming services, pictures and more, and it can also schedule and record live TV. Operating System: Windows.
936. Miro
Calling itself "The beautiful, open-source music and video player that lets you break free," Miro promises amazing performance. It plays your music files like iTunes, syncs with your Android devices, downloads and plays audio and video files, connects with BitTorrent, and allows you to buy music or apps. Operating System: Windows, Linux, OS X, Android, iOS.
937. MPlayer
Based in part on FFmpeg, MPlayer plays a wide range of video file formats. Note that the GUI is optional. It installs as a command-line tool by default, and alternative GUIs are also available. Operating system: Windows, Linux, OS X.
938. SMPlayer
SMPlayer is one of those alternative GUIs for MPlayer. One key feature: it remembers the settings of all files you play, so you can pause and later resume movies or music right where you left off. Operating system: Windows, Linux.
939. Subsonic
With Subsonic you can set up your own streaming media server, or you can subscribe to the premium service for Subsonic to host it for you for $1 per month. It offers a particularly attractive and easy-to-use interface. Operating System: Windows, Linux, OS X, Android, iOS, Windows Phone, BlackBerry, Roku, others.
940. UMPlayer
With more than 270 built-in codecs, UMPlayer plays nearly everything, including audio CDs, DVDs, VCDs, TV cards, YouTube, streams and more. It can even provide playback of some incomplete or damaged files. Operating System: Windows, Linux, OS X.
This multi-functional app can stream videos, audio or images to many different kinds of devices, including gaming consoles, TVs, smartphones, PCs and more. A helpful chart on the website shows how it compares to other streaming server software and services. Operating System: Windows, Linux, OS X.
942. Videos
For Linux only, this app plays video files on the GNOME 3 desktop. Several plug-ins are available to extend its functionality. Operating System: Linux.
943. VideoLAN
Created by the group behind the VLC Media Player, VideoLAN can stream many different kinds of audio and video files. Note that many of the VideoLAN features are now also included in VLC. Operating System: Windows, Linux, OS X.
This incredibly popular app can play multimedia files, DVDs, audio CDs, VCDs, streams and more. It can also do file conversion, and it runs on most platforms. Operating System: Windows, Linux, OS X, iOS, Android.
945. Webinaria
Like the other tools on this list, Webinaria records screen activity. The Webinaria website also allows you to share your recordings in a forum where they can be rated by others. Operating System: Windows, Linux, OS X.
946. Wwidd
Wwidd describes itself as "Del.icio.us for your video collection." It has powerful tagging and search capabilities, and it is very easy to use. Operating System: Windows, OS X, Linux.
947. xine
Xine is a fast multimedia playback engine that can play CDs, DVDs or VCDs as well as files and streaming services. It can handle many different audio and video file format types. Operating System: OS X, Linux, Windows (partial support only).

Multiple Function Security Solutions

948. ASEF
Short for Android Security Evaluation Framework, ASEF is a tool for identifying malware, aggressive adware and apps that hog bandwidth. Organizations can use it to test apps their employees might be using to see if any are problematic. Operating System: Android
This project groups together a whole lot of security-focused Android apps, including Orbot, Orweb, ChatSecure, Obscura Cam, Pixelknot and Ostel. Many of the apps are also available through Google Play, the F-Droid Repository and/or the Amazon Appstore. Operating System: Android
Like INSERT, NST includes a whole lot of tools and a complete Linux distribution that fits on a CD-ROM. In this case, you get nearly 100 tools and the Linux copy is based on Fedora. Operating System: OS Independent.
951. SIMP
The National Security Agency (NSA) isn't exactly known for its openness, but the organization did release a project on GitHub. Short for "Systems Integrity Management Platform," SIMP helps organizations ensure that their security posture lines up with standards and best practices. Operating System: Linux
952. Umbrella
Umbrella takes mobile security a step farther, addressing not only digital security issues but also physical security issues. Developed in conjunction with the aid of NGOs and human rights organizations, it answers questions like "How should I prepare to cross a hostile border?" and "How do I know if I'm under surveillance?" Operating System: Android

Music Education

Realizing the Promise of a Data Lake 
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Sometimes you get one really great line or phrase for a song, but just can't get the rest. The Impro-Visor can help you finish your composition by suggesting improvisations and solos built on your theme. (It's also a valuable educational tool for aspiring jazz musicians.) Operating System: Windows, Linux, OS X.
Music theory students will likely find this app helpful. It includes lessons and interactive games that quiz you on your theory knowledge and ear training. Operating System: Windows, Linux, OS X

Network/System Firewalls

Devil-Linux began life as a dedicated firewall/router, but over time the project grew to include application server capabilities as well. It supports old 486 systems (as well as newer ones), so you can use it to recycle older hardware. Operating System: Linux.
956. FireHOL
FireHOL describes itself as "a language to express firewalling rules." It lets you configure an iptables based firewall using four basic commands. Operating System: Linux.
957. IPCop
Instead of buying an expensive piece of hardware to protect your network, you can create your own Linux-based firewall using IPCop (or one of the similar projects below) and standard PC hardware. This version is designed for home or SOHO deployments and includes an easy-to-use interface. Operating System: Linux.
958. IPFire
IPFire aims to meet the needs of a wide variety of users—home networks, small businesses, large corporations and schools. It's very flexible and customizable with many add-ons available. Operating System: Linux.
959. LEAF
Short for "Linux Embedded Appliance Framework," LEAF can be used to create your own Internet gateway, router, firewall, and/or wireless access point. Several slightly different versions of the application are available on the website. Operating System: Linux.
960. m0n0wall
Although it's based on FreeBSD rather than Linux, m0n0wall can also be used to create your own network firewall appliance. In addition, several companies sell firewalls and/or routers that incorporate the software. Operating System: FreeBSD.
961. pfSense
Like m0n0wall, pfSense is based on FreeBSD. A very popular application, it's been downloaded millions of times and has a very long list of features. Operating System: FreeBSD.
962. Shorewall
Sometimes called "Shoreline Firewall," Shorewall can be used to create an appliance to protect your network or to secure a standalone system. It places high value on being very flexible and powerful rather than particularly easy to use. Operating System: Linux.
963. Smoothwall
This popular project boasts a community with more than 17,000 members. The link here will take you to the free open source version of the software; commercial products based on the same code can be found at Smoothwall.com. Operating System: Linux, Unix.

Network Management

964. Kale
The website Etsy created this tool to help monitor its operations. It includes two separate parts: Skyline, which detects anomalies, and Oculus, which finds similar metrics. Operating System: Linux
965. OpenNMS
The "world's first open source, enterprise grade network management application platform," OpenNMS has been helping administrators monitor their networks for more than a decade. It's highly customizable and highly scalable, and it offers automated and directed discovery and provisioning, event and notification management, service assurance, and performance measurement capabilities. Operating System: Windows, Linux, OS X, iOS.
966. Zenoss
Zenoss helps IT departments monitor and manage their networks, applications and servers, and it includes support for virtualized and cloud environments. Commercial products based on the open source community version are available through Zenoss, Inc. Operating System: Linux, OS X

Network Monitoring/Scanning/Intrusion Detection

967. AFICK
AFICK, which stands for "Another File Integrity Checker," is very similar to Tripwire. It's useful for both intrusion detection and software management. Operating System: Windows, Linux.
968. Cacti
Cacti takes information from RRDtool and uses it produce more advanced graphs. It also offers an intuitive interface and some management capabilities. Operating System: Windows, Linux
969. Ganglia
While most of the tools on our list are designed for run-of-the-mill networks, this tool from the University of California, Berkeley Millennium Project monitors high-performance computing systems such as clusters and grids. It's been around since 2000, and it's currently used on thousands of clusters around the world. Operating System: Linux, others
970. Kismet
Kismet is a combination wireless network detector, packet sniffer, and IDS. Often used to detect unprotected or hidden networks, it's a valuable tool for checking the security of your wireless network, as well as monitoring network activity. Operating System: Windows, Mac, Linux, Unix, BSD
Tcpdump is a packet analyzer and libpcap is a portable library for traffic capture. Both run from the command line and are associated with Riverbed Technology. Operating System: Linux.
972. Munin
Named for a Norse god of memory, Munin aims to help network administrators analyze trends and figure out why performance problems occur. It offers a Web interface, easy installation and easy use. Operating System: Linux, OS X
973. Nagios
The self-described "industry standard in IT infrastructure monitoring," Nagios helps users "achieve instant awareness of IT infrastructure problems," by monitoring servers, switches, applications, and services. The link above will take you to the open source version; enterprise versions can be found at Nagios.com. Operating system: Linux, Unix.
974. NDT
Short for "Network Diagnostic Tool," NDT is a client/server app that offers network performance testing. It can help identify problems such as duplex mismatch conditions on Ethernet/FastEthernet links, incorrectly set TCP buffers in the user’s computer, or problems with the local network infrastructure. Operating System: Linux.
975. Net-SNMP
This set of applications implements SNMP v1, SNMP v2c and SNMP v3 protocols for both IPv4 and IPv6. These are command line tools, so they're not quite as user friendly as some of the other network monitoring applications. Operating System: Windows, Linux
976. Opsview
Used by organizations like Cisco, MIT and Allianz, Opsview allows network administrators to monitor all of their cloud and traditional networks from a single pane of glass. It's available in both open source and paid versions. Operating System: Linux.
977. OSSEC
OSSEC is a scalable, host-based intrusion detection system. Key features include a correlation and analysis engine, integrated log analysis, file integrity checking, Windows registry monitoring, centralized policy enforcement, rootkit detection, real-time alerting and active response. Operating System: Windows, Linux, OS X, others
This "Flexible Monitoring Solution" can be set up to track anything from network status to website defacement to stock market trends. It generates real-time graphs, sends custom alerts, creates SLA reports and much more. Operating System: Windows, Linux, OS X
979. RRDTool
RRDtool calls itself "the open source industry standard, high performance data logging and graphing system for time series data." It's been incorporated into numerous other networking tools, including Endian and Cacti Operating System: Windows, Linux
980. SEC
Although we put this app in the Network Monitoring category, the Simple Event Coordinator (SEC) actually works with many different applications. To use it, you set up a set of rules that specify what actions you want to occur whenever a particular event occurs. Operating System: OS Independent.
981. Snort
Developed by Sourcefire, Snort claims to be the "most widely deployed IDS/IPS technology worldwide." It can detect a wide variety of attacks, including buffer overflows, stealth port scans, CGI attacks, SMB probes, OS fingerprinting attempts and others, and it can send real-time alerts about any ongoing network intrusions. Operating System: Windows, Linux, OS X, others
982.tcpdump
Tcpdump is a command line packet analyzer and libpcap is a C/C++ library for network traffic capture. Working together, the two provide a good network monitoring solution, but they are not particularly user-friendly. Operating System: Linux.
Also associated with Riverbed, this project ports tcpdump to Windows. It uses the WinPcap library (a Windows version of libpcap) to capture traffic. Operating System: Windows.
984. Wireshark
The self-proclaimed "world's foremost network protocol analyzer," Wireshark performs deep inspection of hundreds of protocols, allowing administrators to examine their networks at the "microscopic" level. The project's owner, Riverbed Technology, offers related products and services for sale. Operating System: Windows, Linux, OS X.
985. Zabbix
Calling itself "the enterprise-class monitoring solution for everyone," Zabbix can monitor up to 100,000 networked devices for 1 million metrics, performing thousands of checks per second. It's completely open source, but Zabbix does offer paid support and other services. Operating System: Windows (agent only), Linux, OS X

Office Productivity

986. AbiWord
AbiWord is not a complete office suite—just a word processor. It opens other file formats, including Word and OpenOffice, and it offers advanced document layout capabilities. Operating System: Windows, Linux, OS X
987. Calligra
Calligra is a complete office productivity suite with Microsoft-compatible word processing and spreadsheet software. It also has a vector drawing application called Karbon, a sketching and painting application called Krita, and a diagraming tool called Flow. Operating System: Windows, Linux, OS X
988. Gnumeric
Also not a full suite, Gnumeric is just a spreadsheet program, but it offers very advanced features and excellent accuracy. Note that it no longer supports Windows. Operating System: Linux, OS X
989. Impress.js
Inspired by Prezi, this CSS3-based tool helps users create presentations that scroll, zoom and slide around the screen, instead of being bound to rectangular slides. Note that it doesn't have a particularly user-friendly interface yet and is best for those who are comfortable with code. The project also warns, "impress.js may not help you if you have nothing interesting to say." Operating System: Windows, Linux, Mac, iPad
LibreOffice offers the same set of applications as OpenOffice with a few slight differences. The newest version adds Android support, new spreadsheets functions and more powerful conditional formatting, interface improvements, and better import and export filters. The helpfulcomparison chart on its website shows in detail how its features map to Microsoft Office. Operating System: Windows, Linux, OS X, Android
991. LyX
LyX lets you format your document based on its structure. You mark text as a title, subtitle, etc., and then worry about the formatting later. It makes it easier to ensure continuity throughout long documents and deal with some of the difficulty of creating a document on a netbook or other device with a very small screen. Operating System: Linux, Unix, Windows, OS X
992. NeoOffice
Very similar to OpenOffice and LibreOffice, NeoOffice is a Mac-only option that is compatible with Microsoft Office and the other major open source productivity suites. Note that the free version offers viewing, editing and printing only; the version that allows you to save documents can be downloaded from the Mac App store for $29.99. Operating System: OS X, iOS
993. OpenOffice
While Microsoft Office is much less expensive than it used to be, the price for the full installable version still adds up over time. Apache OpenOffice offers Office-compatible word processing, spreadsheets, presentations, graphic editing and database software. It's been downloaded more than 100 million times and is one of the most popular desktop open source software suites. Operating System: Windows, Linux, OS X
This helpful app lets you view and read OpenOffice and LibreOffice documents from Android devices. It doesn't have editing capabilities, but does support spreadsheets. Operating System: Android
995. Reveal.js
Another HTML presentation creation tool, Reveal.js features an interesting three-dimensional navigation system (go up or down as well as backwards and forwards), and unlike Impress.js, it has an easy-to-use editor. The link above will show you Reveal.js in action; for the source code, see the GitHub page. Operating System: Windows, Linux, Mac, iPad
Sparklines doesn't replace Excel--it extends its functionality with new functions that create simple, intense graphics known as Sparklines. See the user manuals for examples of the type of charts and graphs it can create. Operating System: Windows
997. WriteType
This option doesn't teach students to type—it makes typing easier, particularly for younger users. It includes features like word completion, read aloud mode, grammar checking and auto-correction that make it easier for young people to create documents on their own. Operating System: Windows, Linux
998. X-OOo4Kids
OpenOffice.org for Kids offers a simplified version of OpenOffice.org designed to be used by those aged 7-12. The advantage of this version, even if you're not a kid, is that it loads and runs very quickly and requires very little space on your portable drive. Operating System: Windows

Online education/eLearning

999. ATutor
ATutor was designed to comply with industry standards, such as SCORM Content Packaging, SCORM 1.2 LMS RTE3, OAuth Authentication Protocol and others, and accessibility standards, such as W3C WCAG 2.0, W3C ATAG 2.0, US Section 508 and many others. Try the online demo to see it in action. Operating System: OS Independent.
1000. Canvas
This learning management system humbly hopes to "change the world." It comes in K-12 and higher education versions, and the website has a catalog of courses offered by organizations that use its software. Both free and paid cloud versions are available. Operating System: Linux, Unix, OS X.
1001. Chamilo
Based in Spain, Chamilo is popular with European universities and organizations. Paid services are available through third-party providers. Operating System: Windows, Linux, Unix, OS X
1002. Claroline
Claroline claims to be "the first real learning management system dedicated to the learning process rather than the teaching process." It has a large international user base from more than 100 different countries. Operating System: Windows, Linux, OS X
1003. eFront
Unlike most of the other learning management systems on our list, eFront places particular emphasis on meeting the training needs of enterprises. It's available in paid hosted and enterprise versions, as well as the open source edition. Operating System: Windows, Linux
1004. ILIAS
Winner of numerous awards, ILIAS is a standards-based learning system that complies with SCORM 1.2 and SCORM 2004 and has been certified by NATO. Like Claroline it has a large international community of users and developers. Operating System: Windows, Linux
1005. Moodle
One of the most popular online learning platforms in the world, Moodle offers an intuitive interface, personalized dashboards, collaborative tools, notifications, progress tracking and more. Microsoft has released multiple plugins for the platform that connect it to Office 365 and other Microsoft services. Operating System: Windows.
1006. Sakai
Sakai counts many well-known organizations, including the University of Oxford, Stanford University, Duke University, The University of Melbourne, Stockholm University and the Arizona Department of Eduction, among its users. It is both a learning management solution and a research collaboration tool, making it appropriate for many R&D groups. Operating System: OS Independent.

OpenCourseWare

1007. eduCommons
A number of universities around the world aren't just utilizing open-source software, they're "open-sourcing" the content of their courses by making it freely available online. EduCommons is a content management system designed for these OpenCourseWare projects. Operating System: OS Independent.
The Open Courseware Consortium offers links to hundreds of "open source" university classes. Study nearly any subject you want with materials from institutions like MIT, Johns Hopkins, University of Michigan, University of California and dozens of others. Operating System: OS Independent

Operating Systems and Kernel Modifications

1009. 64 Studio
Another Debian/Ubuntu variant, 64 Studio is optimized for multimedia and digital content creation. It hasn't been updated in a while, but paid support is available.
1010. andLinux
A good option for Windows users who would like to try out some Linux applications, andLinux runs Linux applications on Windows 2000, 2003, XP, Vista, or 7 machines.
1011. Android
Currently the most popular mobile operating system available, Google's Android is an open source project. Numerous manufacturers, including Samsung, LG, HTC and Motorola, offer Android-based smartphones and tablets.
1012. Antergos
Previously known as Cinnarch, Antergos is based on Arch Linux, which is popular with hard-core open source users, but Antergos much easier for beginners to use than Arch. It comes with a graphical installer that allows the user to choose from among several interfaces, including some that look quite a bit like XP.
1013. AntiX
Designed specifically for older systems, AntiX claims it can even run on old 64 MB Pentium II 266 systems. It comes in full, base and core distributions, with full being the best option for Linux newcomers.
1014. ArchBang
This Arch variant uses the Openbox Window Manager. It's fast and lightweight, and offers many of the same customization capabilities as Arch.
1015. Arch Linux
Arch is definitely not for Linux newbies, but its simple design makes it a favorite among long-time Linux users who are comfortable with the command line. By default, it installs a minimal base system but provides plenty of options for customization.
1016. Bio-Linux
Developed by the NEBC, Bio-Linux is a Ubuntu variation that includes more than 500 bioinformatics programs useful for biology and healthcare researchers. You can install it on a workstation or run it live from a CD, DVD or USB thumb drive.
1017. Bodhi Linux
Another lightweight variation of Ubuntu, Bodhi is a true minimalist distribution that installs only a few pieces of software by default. That makes it great for users with older hardware or users who want to have a lot of say in which applications are installed; however, it might not be as good for new users who don't have familiarity with open source applications.
1018. CentOS
This "Community ENTerprise Operating System" is another free version of Red Hat. It aims to be highly stable and manageable to meet the needs of business users without requiring that they purchase support.
1019. Chromium
Chromium is the open source project behind Google's Chrome OS—the operating system used on Chromebook devices. It's best for users who use Google's cloud services heavily. Less technical users may find it challenging to install Chromium on a former Windows XP machine.
1020. Contiki
This open source IoT operating system boasts highly efficient memory allocation, full IP networking, power awareness, standards support, dynamic module loading, support for a wide variety of hardware and more. There are a wide variety of papers, books and other support materials to help users and developers get started using it.
1021. CoreOS
CoreOS is version of Linux designed for massive server deployments. It's a minimal distribution that includes nothing but the Linux kernel and systemd.
1022. CrunchBang
Because it's fairly lightweight, CrunchBang (sometimes written #!) is a good option for older or underpowered systems that might be running Windows XP. It's based on Debian but uses the OpenBox window manager, which will feel familiar to Windows users.
1023. Debian
A very complete Linux distribution, Debian comes with 43,000 packages of free software pre-installed. It has been used as the basis for many other versions of Linux and remains popular with many veteran Linux users.
This Debian variation incorporates many educational games and apps, and it's available in multiple languages. The name "Skolelinux" is Norwegian for "school Linux."
1025. Dyne:bolic
Dyne:bolic boasts that it is recommended by the Free Software Foundation. Like Ubuntu Studio, it's an operating system for creative professionals and has a wide variety of audio and video production and editing tools built in.
1026. Edubuntu
For those looking to replace Windows XP on a PC primarily used by kids, Edubuntu is an excellent choice. It's based on Ubuntu (and supported by Canonical, the company behind Ubuntu), so it's very user-friendly. Plus, it adds plenty of software tailored for use by schools or home users with children.
1027. eLinux
A number of IoT devices run the Linux kernel (or a portion of it). This site provides extensive information about using Linux in embedded systems.
1028. eyeOS
Built for cloud computing, eyeOS makes an entire desktop, including office productivity applications, accessible from a Web browser. It also serves as a platform for creating new Web apps.
According to Distrowatch, Elementary is among the ten most popular Linux distributions. It's very lightweight and fast, and the interface, while more similar to OS X than Windows XP, is highly intuitive.
1030. Fedora
Fedora is the community version of Red Hat Enterprise Linux; in other words, it offers essentially the same technology but does not require a paid support subscription. It comes in workstation, server and cloud versions.
1031. FreeRTOS
With millions of deployments, FreeRTOS claims to be "the market leading real time operating system (or RTOS), and the de-facto standard solution for microcontrollers and small microprocessors." Optional commercial licensing and support are available.
1032. Frugalware
Like Slackware, Frugalware is best for users who aren't afraid of the command line, although it does have some graphical tools. It's designed with simplicity in mind.
1033. Gentoo
First released in 2002, Gentoo boasts "extreme configurability, performance and a top-notch user and developer community." It uses the Portage package management system, which currently includes more than 10,000 different applications.
1034. GoboLinux
GoboLinux's claim to fame is that is doesn't use the Unix Filesystem Hierarchy Standard, but instead stores each program in its own sub-directory in the Program directory. That means that it's a little bit easier to use for Linux newbies or experienced Linux users who like to install applications from the original source code.
1035. gNewSense
Supported by the Free Software Foundation, gNewSense is based on Ubuntu with a few changes, like the removal of non-free firmware. The name started as a pun on "Gnu" and "nuisance" and is pronounced guh-NEW-sense.
1036. Illumos
When Oracle discontinued development of OpenSolaris, some of the developers who had been working on the project forked it to the Illumos project, where development and bug fixes continue. If you are looking for a free version of Solaris, this is the option for you. To download the software, visit the OpenIndiana page above.
1037. IprediaOS
This Linux distribution focuses on privacy protection, and it automatically encrypts and anonymizes all network traffic. Mail, peer-peer, bittorrent, IRC chat and several other applications are included.
1038. Korora
Based on Fedora, Korara "aims to make Linux easier for new users, while still being useful for experts" with an operating systems that "just works." Several different desktops are available, so users can choose the interface that seems the most comfortable and familiar.
1039. Knoppix
If you just want to give Linux a try without installing anything on your hard drive, Knoppix runs from a Live CD. You can download the code and create your own CD or order a very inexpensive pre-made CD from any one of a variety of vendors.
1040. Kubuntu
Kubuntu's goal is to "make your PC friendly," and it's fairly easy for new Linux users to figure out. It combines Ubuntu and the KDE desktop and includes plenty of built-in software, like a web browser, an office suite, media apps and more.
1041. Kwheezy
Kwheezy is based on Debian, which is popular with advanced Linux users, but it's designed to be more accessible for Linux newcomers. It comes "with all the applications, plugins, fonts and drivers that you need for daily use, and some more," and it uses the intuitive KDE desktop.
Built for privacy advocates, dissidents and sleeper agents, this version of Linux runs from a thumb drive and instantly turns any system into a secure communication node. It connects users with the Tor network to make their activities anonymous and untraceable.
1043. Linux Lite
As its name implies, this is another lightweight Linux distribution. Its website states, "The goal of Linux Lite is to introduce Windows users to an intuitively simple, alternative operating system. Linux Lite is a showcase for just how easy it can be to use linux."
1044. Linux Mint
Linux Mint claims to be the "third most widely used home operating system behind Microsoft Windows and Apple Mac OS." It offers four different choices for the desktop interface, some of which feel very similar to older versions of Windows.
1045. Lubuntu
If you have an older system that doesn't meet the system requirements for Windows 7 or 8, Lubuntu might be a good option for you. It's a lightweight version of Ubuntu that's very fast and energy efficient, and it's a particularly good choice for underpowered Windows XP laptops.
1046. LXLE
This variation on Lubuntu was specifically designed to help users give new life to older PCs. It has four different desktop paradigms (basically different looks), including one that mimics Windows XP. Users who have grown tired of XP's long boot times will also appreciate the fact that LXLE boots in less than a minute on most systems.
1047. Mageia
Forked from Mandrake (which was later renamed Mandriva), Mageia is a community-driven Linux distribution with a good reputation for being beginner-friendly. Because it's updated very frequently, it tends to include more recent versions of software packages, and it has excellent support for several different languages.
1048. Manjaro
Like Antergos, Manjaro aims to be a more user-friendly version of Arch. It comes with desktop environments, software management applications and media codecs pre-installed so users can get right to work after installing it.
1049. Matriux
This Linux distribution includes more than 300 tools for "penetration testing, ethical hacking, system and network administration, cyber forensics investigations, security testing, vulnerability analysis, and much more." It's based on Debian and can run from a Live disk.
1050. mbed
Developed by ARM and its partners, mbed is an operating system designed for IoT devices that run on ARM processors. It includes a C++ application framework, and the company also offers other development tools and a related device server.
1051. MEPIS
Popular with new Linux users, MEPIS aims at providing a Linux distribution that's very stable and very easy to use. It comes with hundreds of applications preinstalled and you can easily dual-boot it alongside Windows so that you can continue using XP software.
While most of the operating systems in this section are more secure than normal, Metasploitable is intentionally insecure. It was designed to help train people in security administration and penetration testing.
1053. Musix
Musix is a version of Linux created to meet the needs of musicians. Note that while much the website is in Spanish, the OS and help forums are available in English.
1054. Nanolinux
This desktop Linux distribution is extremely small—just 14 MB—but still includes popular applications like a browser, text editor, spreadsheet, paint program, games and more. It can run from RAM, giving it extremely fast performance.
1055. Netrunner
Netrunner is based on Kubuntu, plus some interface modifications to make it even more user friendly and some extra codecs to make it easier to play media files. The project also offers a second version of the same OS based on Manjaro.
1056. NetSecl
A hardened version of OpenSuse, NetSecl can be used as a regular desktop/server operating system or for penetration testing. It includes popular hacking tools like Metasploit.
1057. OpenMandriva
Like Mageia, OpenMandriva is a community-managed Linux distribution based on Mandrake/Mandriva. It attempts to be simple and straightforward enough for new users but also to offer the breadth and depth of capabilities demanded by advanced users.
1058. openSUSE
OpenSUSE is based on the same technology as SUSE Linux Enterprise, but is completely free with no support contract required. It comes in two different versions: Leap and Tumbleweed.
1059. PC-BSD
Users interested in trying a desktop operating system that isn't based on Linux can also check out PC-BSD. It's based on FreeBSD, which is known for its stability, and emphasizes user-friendliness. Older versions supported the KDE desktop only, but the latest update allows users to select their choice of desktop interface.
1060. PCLinuxOS
Like many other OSes on this list, PCLinuxOS was designed with usability in mind. It can run from a LiveCD, meaning you can try it out while still keeping Windows XP installed on your PC.
1061. Peppermint
Also based on Lubuntu, Peppermint prides itself on "welcoming new Linux users." It's extremely fast and takes a web-centric approach to computing.
1062. Pinguy OS
According to the Pinguy website, "PinguyOS is very much designed for people who are new to the Linux world; many people coming from both a Windows or a Mac background will find plenty of familiar features along with some new ones that aren’t available in either Windows or Mac." It's based on Ubuntu and uses the Gnome-Shell desktop.
1063. Point Linux
Also based on Debian, Point Linux uses the Mate desktop, which should feel comfortable to most Windows XP users. It aims to be a "fast, stable and predictable" desktop operating system.
1064. Puppy
Puppy is super small—just 85 MB—so that is usually loads into RAM on most systems and runs incredibly fast, even on older systems that might have been running Windows XP. Despite its small size, it includes a full graphic interface designed for new Linux users.
1065. PwnPi
Built to run on the Raspberry Pi, PwnPi is another Linux distribution focused on penetration testing. Although its lightweight enough to run on Pi, it includes more than 200 of the best tools for finding vulnerabilities.
This project lets you use an inexpensive Raspberry Pi system to run your digital sign. It can play Web content or locally saved video or photo files.
1067. Raspbian
Raspbian is a variation of Debian Linux optimized to run on the Raspberry Pi. It includes more than 35,000 applications that can run on the device.
1068. ReactOS
Unlike most of the other operating systems on this list, ReactOS isn't a version of Linux or BSD; instead, it's a completely new free OS designed to be Windows-compatible. At this point, it's still an alpha release, but it shows promise.
Red Hat's best known product is its flagship distribution of Linux, which requires a paid subscription. According to the company, more than 90 percent of the Fortune Global 500 companies use Red Hat products.
1070. RIOT
RIOT calls itself "the friendly operating system for the Internet of Things," and it aims to be developer-friendly, resource-friendly, and IoT-friendly. Key features include support for C and C++, partial POSIX compliance, multi-threading, energy efficiency and more.
1071. Robolinux
Also similar to Windows, Robolinux promises to allow users to run all their Windows XP and 7 software without making themselves vulnerable to malware. It also includes more than 30,000 open source applications.
1072. Sabayon
This Linux distribution focuses on providing an excellent "out of the box" user experience where everything "just works." At the same time, it attempts to incorporate the latest releases of open source software. And in case you were wondering, the name comes from an Italian dessert.
1073. Salix OS
According to the Salix website, "Like a bonsai, Salix is small, light and the product of infinite care." It's based on Slackware, but it's simplicity makes it more accessible for Windows users.
Created by the folks at the Fermi National Accelerator Laboratory and the European Organization for Nuclear Research (CERN), as well as various scientists and universities, Scientific Linux (SL) aims to prevent scientists at each of these different institutions from having to recreate a Linux distribution that meets their needs. It's basically the same as Red Hat Enterprise Linux with a few slight modifications.
1075. SELinux
SELinux gives allows administrators to set finer controls on what certain users can or cannot access on a system. It has been incorporated into many security-focused Linux distributions.
1076. Simplicity
Simplicity is based on Puppy Linux and offers a slightly different look and feel. It comes in four different flavors: Obsidian and Netbook are lightweight versions suitable for older systems, Media is built for PCs that are used as media centers, and Desktop is the standard, full-featured version.
1077. Slackware
First released in 1993, Slackware is one of the oldest Linux distributions. Popular with the geekiest of geeks, it relies heavily on command-line tools and is very similar to UNIX.
Ubuntu is one of the most popular distributions of Linux, and this variation brings Ubuntu to the Internet of Things. It can run on cloud computing services like Microsoft Azure, Google Compute Engine and Amazon Elastic Compute, as well as on IoT devices like the BeagleBone Black and the Raspberry Pi.
Also popular with large organizations, this enterprise-focused Linux distribution also requires a paid subscription. The company says it has more than 13,000 business users, include the London Stock Exchange, SAP, Teradata and Walgreens.
1080. TinyOS
Downloaded more than 35,000 times per year, TinyOS is a popular operating system designed for low-power wireless devices, such as those in IoT deployments. It boasts excellent support for networking and low-power operation.
1081. Tizen
Governed by the Linux Foundation, Tizen is a Linux-based operating system for mobile and connected devices, and it comes in versions for vehicles, smartphones and tablets, TV and wearables. Samsung sells several products based on the operating system and has been one of its largest supporters.
1082. Trisquel
Trisquel is a Ubuntu-based Linux distribution aimed at home users, small enterprises and schools. The interface resembles the traditional Windows look and feels very similar to XP or Windows 7.
1083. Ubuntu
Ubuntu offers desktop, server, cloud, phone, tablet and IoT versions of its popular Linux distribution. Reported users include Amazon, IBM, Wikipedia and Nvidia.
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This Ubuntu variant runs from a CD and creates a secure environment for working with sensitive data. It's not meant to be installed permanently on a hard drive; instead, you use it when working with data that you don't want to be stolen or in order to prevent others (like a government entity) from monitoring your online activities.
This Linux distribution was made for people who work with audio, graphics, video, photography or publishing files. It includes a wide range of tools for creative work, including many of those on this list.
1086. VectorLinux
The self-proclaimed "best little Linux operating system available anywhere," lightweight VectorLinux aims to be very fast and very stable. It includes tools that will be popular with advanced users but it also has an easy-to-use graphic interface for newbies.
1087. Xubuntu
Like Lubuntu, Xubuntu is a lightweight version of Ubuntu. It uses the Xfce interface, which is clean, modern and easy to use. It also runs well on older hardware.
1088. ZenWalk
Formerly known as "Minislack," ZenWalk is a lightweight distribution that focuses on fast performance and support for multimedia. It includes some special features that appeal to programmers, and the desktop version can also be tweaked to function as a server. Note that the website is organized like a forum, so it can be a little tricky to navigate.
1089. Zorin OS
Built specifically to attract former Windows users, Ubuntu-based Zorin is probably the Linux distribution that's the most similar to Windows. It includes a unique "Look Changer" that switches the desktop to look like Windows 7, XP, Vista, Ubuntu Unity, Mac OS X or GNOME 2, and it includes WINE and PlayOnLinux to allow users to keep using their Windows software.

Password Crackers

1090. Cryptohaze
Cryptohaze brings together three different tools for auditing passwords: two Muliforcers and a Rainbow Tables tool. It runs on most types of systems, including those with Atom processors and those without a GPU. Operating System: Windows, Linux, OS X.
John the Ripper excels at detecting weak passwords, but you'll need a list of common passwords to use with it. A paid pro version is also available. Operating System: Windows, Linux, OS X.
1092. Ophcrack
If you need to recover a password that has been lost or forgotten, Ophcrack can usually do the trick. It relies on both rainbow tables and brute force techniques. Operating System: Windows, Linux.

Password Management

1093. Encryptr
Encryptr can function both as a password manager and as an e-wallet. Built on the Crypton framework, it stores encrypted sensitive data in the cloud, decrypting data only on your devices. Operating System: Windows, Linux, OS X, Android.
1094. Entropass
Protect yourself online by using this browser add-on to generate and remember highly secure passwords. Unlike some other password managers, this one uses two-factor security: you choose any file to act as your private key when accessing a site, providing you with an extra layer of protection. Operating System: OS Independent.
1095. iKeePass
This apps ports the popular KeePass password safe for iOS. It saves all of your passwords in an encrypted database, so that you only have to remember one master password. It runs on both iPhones and iPads, and it is available through the App Store. Operating System: iOS
Instead of writing down your passwords or, even worse, using the same one over and over, use a password safe. KeepPass stores unique passwords for every service or site in an encrypted database that you access with a single master password. Operating System: Windows.
1097. KeePassDroid
And this tool ports KeePass to Android. It doesn't automatically sync with the desktop version, but the website explains how to use Dropbox to gain that functionality. Operating System: Android
1098. KeePassX
This variation of the original KeePass supports Linux and OS X, as well as Windows. It also includes a password generation utility. Operating System: Windows, Linux, OS X.
While most password protection apps rely on an encrypted database to store passwords, this app uses a unique algorithm to generate passwords on the spot. It requires no syncing, and passwords can never be lost. Operating System: Windows, Linux, OS X, iOS, Android
1100. PasswdSafe
There is a popular open source password safe for desktops called simply Password Safe. This tool ports that app for Android. A companion app allows syncing with a cloud service to support multiple devices. Operating System: Android
Downloaded more than 4 million times, this Password Safe installs in just minutes. The desktop version is free or you can purchase the portable version for use on a thumb drive. Operating System: Windows.
1102. PWGen
Using easy-to-guess passwords is just as bad as using the same password all the time. PWGen creates strong passwords for you, so you won't be tempted to use "password" or "123456." Operating System: Windows
This app not only stores encrypted passwords, it can also store other "secret" information, like account numbers. There is also a related version for PCs and a tool to sync your Android device with your PC. Operating System: Android
This cross-platform password manager runs on Android as well as desktop operating systems. It claims to be simpler to use than some other password safes. Operating System: Windows, Linux, OS X, Android.
1105. XPrivacy
This "ultimate, yet easy to use, privacy manager for Android" prevents apps from getting access to your sensitive information, and if an app requires access to sensitive information, such as your location, in order to run, the app will actually feed it fake data. And BlackDuck named it a 2013 Open Source Rookie of the Year winner. Operating System: Android

PDF Tools

1106. jPDF Tweak
This Java-based app functions like a "Swiss army knife for PDF files," allowing users to combine, split, reorder, watermark or rotate pages. In addition, it provides encryption and digital signature capabilities. Operating System: OS Independent
1107. PDFCreator
This helpful tool allows users to create PDFs or image files from almost any printable file format. It also includes encryption and document merge capabilities. Paid and free versions are available. Operating System: Windows
1108. PDFedit
If you need to alter an existing PDF file, this tool does the job. It allows you to insert, change, delete or highlight text and edit graphics. Operating System: Windows, Linux
1109. PDF SAM
The "SAM" part of this project's name stands for "split and merge," and just as it suggests, it allows users to divide existing PDFs into separate documents or combine multiple PDFs into one document. It's especially useful if you just need to reorder the pages in a PDF. The paid enhanced version adds encryption and metadata editing capabilities. Operating System: Windows, Linux, OS X
1110. Sumatra PDF
The free Adobe software isn't your only option for reading PDF files. The Sumatra PDF reader offers similar functionality with a lighter footprint for faster performance. Operating System: Windows

Personal Financial Management

1111. Buddi
The "personal budget software for the rest of us," Buddi offers simplified financial management that's doesn't have as many features as Quicken but is easier for novices to use. The tutorials on the website offer all the help most people need to start tracking their income and expenses. Operating System: OS Independent
1112. dsBudget
This bare-bones budgeting application helps answer the question, "Where did my money go?" You can install on your local system, on a USB stick or on Dropbox. Operating System: Windows, Linux, OS X
EclipseTrader includes real-time quotes, intraday and historical charts, financial news, analysis tools and integrated trading capabilities. Aimed at serious traders, it collects a wealth of information in a single location. Operating System: Windows, Linux, OS X
1114. Financisto
This open source Android app lets you track your budget from your smarphone or tablet. Key features include Quicken and CSV import, support for multiple accounts and currencies, recurring transactions, budgets and advanced reports. Operating System: Android
1115. Grisbi
This option can track finances for a small or home-based business in addition to personal finances. At the time of writing, the home page was under construction, but the software download is still available through SourceForge. Operating System: Windows, Linux
1116. HomeBank
Now nearly twenty years old, this financial management software is easy to use and can import and export to and from popular applications like Quicken and Money. Noteworthy features include duplicate detection, scheduled transactions, tagging, reminders, category splits, budgeting, dynamic reports, auto-completion and more. Operating System: Windows, Linux
1117. JGnash
This Java-based personal finance system features double-entry accounting, account reconciliation, PDF report generation, auto-completion, recurring payments, multiple currency support and more. It aims to be easy to use, accurate and flexible. Operating System: Windows, Linux, OS X
1118. JStock
JStock allows investors to track stocks on 26 world stock markets. Features include alerts, charting, market chitchat and cloud storage. Operating System: Windows, Linux, OS X.
1119. KMyMoney
This double-entry accounting package strives to provide the same features as commercially available software, and it comes very close to that goal. It's very easy to use and has an attractive interface. Operating System: Windows, Linux, OS X
Money Manager Ex (a.k.a. MMEX) offers a simple, user-friendly interface that includes "all the basic features that 90% of users would want to see in a personal finance application." Key capabilities include AES encryption support, budgeting, depreciation tracking, reminders, one-click reporting, cash flow forecasting and more. Operating System: Windows, Linux, OS X
1121. Yapbam
Short for "yet another personal bank account manager," Yapbam is a Java-based, portable personal finance manager. It now integrates with Dropbox, making it easy to sync your financial information if you use multiple devices. Operating System: Windows, Linux, OS X

Photo Albums and Tools

If you have your own Web server, you can use Coppermine to manage and share your photo collection with the world. It stores photo information in a MySQL database and allows you to organize your photos into online albums, upload photos, view slideshows and much more. Operating System: OS Independent
1123. digiKam
This powerful image manager for the KDE desktop aims to meet the photo organization needs of professional photographers. Key features include photo import, tagging, auto-transformations, a light table and more. Operating System: Windows, Linux, OS X
1124. Eye of GNOME
The official photo manager for the Gnome desktop, Eye of GNOME supports a wide variety of image file formats. It offers a basic set of capabilities that allow you to browse your images, view properties and metadata, and print your photos. Operating System: Linux
1125. gThumb
Also for Gnome, gThumb includes an image browser, viewer, organizer and editor. Advanced features allow image import, slideshows, converting among file formats, removing duplicate images, creation of Web albums and more. Operating System: Linux
1126. Gwenview
Another photo viewer for KDE, Gwenview makes it easy to browse and view images, while also offering some basic editing capabilities. It displays image properties and meta information, and it can also play videos and animations. Operating System: Linux
1127. KPhotoAlbum
Also for KDE, KPhotoAlbum aims to make it possible to find any photo on your drive in five seconds or less. It offers automated tools for annotating, categorizing, searching and viewing your pictures. Operating System: Linux
1128. RawTherapee
This project offers batch processing of raw photo files. It boasts "the most details and least artifacts from your raw photos thanks to modern and traditional demosaicing algorithms." Operating System: Windows, Linux, OS X
1129. Shotwell
This photo manager for the Gnome desktop makes it easy to import, organize, edit and publish your pictures. It offers basic editing features like cropping, rotation, red-eye removal, saturation, tint and temperature, and it integrates with Facebook, Flickr, Picasa and YouTube. Operating System: Linux
1130. UFRaw
This utility can be used on its own or as a Gimp plug-in. It allows users to manipulate and view raw images and convert them to other formats. Note that like the other tools for working with raw images, you'll need to have some expertise to use this app. Operating System: Windows, Linux, OS X

Physics

1131. Step
Step is an interactive physics simulator that allows students to explore classical mechanics, particles, springs, gravity, coulomb forces, collisions, sound waves and much more. It also includes an equation solver and a unit conversion tool. (Note that in order to use Step on Windows, you'll have to download KDE for Windows.) Operating System: Windows, Linux

Poetry

This website offers tools to help you write your own poem or to collaborate with other poets on an open source creation. You can save your lines for your own reference or for others to use in creating new works. Operating System: OS Independent

Point-of-Sale (POS)

1133. Floreant POS
Designed to meet the unique needs of restaurants, Floreant offers features like kitchen print, food, ticket merge and split, cooking instruction, discounts, tips, gift cards, coupons and more. It was originally developed for a Denny's in New York and is now used in more than 25,000 establishments in 35 countries. Operating System: Linux
Part of the Openbravo for Retail suite, this POS solution supports touchscreens, ticket printers, customer displays and barcode scanners, as well as providing product entry forms and reporting. Openbravo also sells paid solutions based on similar technology. Operating System: Windows, Linux, OS X
1135. POSper
A good option for small businesses and restaurants, POSper integrates with touchscreens and includes a sizeable list of features. The website includes a helpful demo of the app's backoffice operations. Operating System: OS Independent
1136. uniCenta
Downloaded more than half a million times, this solution was originally developed by a business in Europe that needed a POS system. A redesigned update is due for release very soon. Operating System: Windows, Linux, OS X

Privacy Protection

1137. AdBlock Plus
With more than 15 million uses, AdBlock Plus is one of the most popular add-ons available. It allows you to block all advertisements (and their related tracking cookies) or just "unacceptable" advertisements that don't meet the criteria specified by the app developers. Operating System: Windows, Linux, OS X.
The We Are Hidden group packaged together this set of privacy tools for Linux users. It includes Proxy Chains, Putty, Tor, True Crypt and more. Operating System: Linux
This Firefox add-on protects against Flash cookies (a.k.a. "Super Cookies") that websites can use to track your activities even when you have cookies disabled. Note that if you play any online Flash-based games, you will need to have this add-on disabled in order to save your scores and game progress. Operating System: Windows, Linux, OS X
1140. Collusion
Want to see which sites and organizations are tracking your online activity? This experimental add-on for Firefox can show you. Note that because it's still in the early stages of development, Collusion can sometimes slow your browsing. Operating System: Windows, Linux, OS X
Cookie Monster offers more detailed control over which sites can and cannot leave cookies on your system. It also makes it easy to see and manage the cookies already on your system. Operating System: Windows, Linux, OS X
1142. GoldBug
This secure communication app offers encrypted instant messaging, e-mail, file sharing and IRC. It also has the ability to authenticate users and supports emoticons. Operating System: Windows, Linux.
A collaboration the Tor Project and the Electronic Frontier Foundation, this Firefox and Chrome plug-in accesses sites via https instead of http whenever possible. As a result, it encrypts most of your communications with many websites. Operating System: OS Independent
The self-proclaimed "first privacy protection software for Android phones," this app blocks malware and adware and prevents your Android device from providing sensitive information to any apps. However, it is a little difficult to set up, and it requires a rooted phone. Operating System: Android
Used by the U.S. government, this project turns any PC (or Mac) into a secure computing node. When you plug in a USB drive containing LPS into your system, it enables secure, private Web browsing and prevents the system from downloading any malware. Operating System: OS Independent
You might think you are improving your smartphone security by setting a pattern lock screen, but most people use one of a handful of patterns that are easy to guess. This tool generates a random pattern (and helps you learn it) to improve your security. Operating System: Android
1147. Orbot
Essentially, Orbot is "Tor for Android." It connects users to the Tor secure internet browser when visiting websites, and it also allows other apps to connect to Tor in order to protect users' privacy. Operating System: OS Independent
1148. PeerBlock
If you are accessing a P2P network, you can use PeerBlock to prevent your computer from connecting with "known bad" computers, such as those serving spyware. It comes with a default list of blocked addresses or you can create one of your own or use a list created by other PeerBlock users. Operating System: Windows
1149. Places
Places is a platform for sharing messages, photos and files securely. It encrypts information end-to-end so that only the intended recipients can view it. The source code is available, and for now, the beta service is completely free although the company does intend to add paid services in the future. Operating System: OS Independent.
1150. Privoxy
Want to set up your own proxy server? Privoxy describes itself as "a non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk." It can protect networks or standalone systems. Operating System: Windows, Linux, OS X
This Firefox extension puts you in control of when cross-site requests are allowed. It can help you avoid tracking by marketing firms, and it can help prevent cross-site forgery attacks. Operating System: Windows, Linux, OS X
1152. Scotty
Scotty offers "a free open source proxy software for bypassing filter and censorship systems." To use it, you'll need a gateway (either your own Web server or one on Google App Engine) plus a Java executable on your local system which bypasses filters and encrypts communication. Operating System: OS Independent.
Communicate securely with individuals or groups. Signal offers encrypted chat that uses your existing phone numbers and address book. Operating System: Android
1154. SUM
Short for "Secure Ultimate Messenger," SUM is a confidential, encrypted instant messaging program. Unlike many similar programs, it doesn't save messages on a server, providing an extra layer of security. Operating System: OS Independent.
1155. Torbutton
This Firefox add-on makes it easy to turn Tor (see above) on or off for anonymous browsing. Note that when you are using it, you will not be able to access sites that use JavaScript, some CSS features, or Flash. Operating System: OS Independent
Downloaded hundreds of millions of times, this popular add-on rates sites as green, yellow or red, depending on their reputation for security. It's available for mulitple browsers, including Firefox, Chrome, Internet Explorer, Safari and Opera. Operating System: Windows, Linux, OS X.

Programming Languages

1157. Dart
Another Google language, Dart can be used to build Web apps or server-based apps. It describes itself as "class-based and object-oriented, without being dogmatic." Operating System: Linux, OS X
1158. ECL
Enterprise Control Language, or ECL, is the language developers use for creating big data applications on the HPCC platform. An IDE, tutorials and a variety of related tools for working with the language are available on the HPCC Systems website. Operating System: Linux.
1159. Go
First released by Google in 2009, Go is a static language somewhat similar to C but with garbage collection and some dynamic capabilities. The Go website describes it as "a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language." Operating System: Linux, OS X
1160. F#
Created by Microsoft, F# is a cross-platform "functional-first" programming language. The website includes a huge number of tools for learning the language and using it to write applications. Operating System: Linux, OS X
1161. Harlan
Many systems today include GPUs, which promise greater performance and lower energy use. Harlan is an attempt at a programming language designed specifically to take advantage of the capabilities of GPUs. Operating System: Linux, OS X
1162. Java
One of the two most popular programming languages in the world, Oracle-owned Java enables developers to write cross-platform applications. A huge array of related IDEs, libraries and related tools are available. Operating System: OS Independent
1163. Lua
Used by World of Warcraft and Angry Birds, Lua claims to the "leading scripting language for games." Developed by a Brazilian team, the name for this twenty-two-year-old language is the Portuguese word for "moon." Operating System: OS Independent
1164. Perl
Often used for Web development, Perl is now nearly thirty years old. It is object-oriented, procedural and functional, and it integrates easily with databases. Operating System: Windows, Linux, OS X
1165. PHP
Another popular Web language, PHP powers the server side of some of the world's most popular websites. It stands for "PHP:Hypertext Preprocessor," and it is maintained by The PHP Group. Operating System: Windows, Linux, OS X
Another Apache Big Data project, Pig is a data analysis platform that uses a textual language called Pig Latin and produces sequences of Map-Reduce programs. It helps makes it easier to write, understand and maintain programs which conduct data analysis tasks in parallel. Operating System: OS Independent
1167. Python
Known for being easy to learn, Python is a dynamically-typed language that emphasizes speed and code readability. Its core philosophy is expressed in twenty aphorisms, including "beautiful is better than ugly," simple is better than complex," and "special cases aren't special enough to break the rules." Operating System: Windows, Linux, OS X
1168. R
Similar to the S language and environment, R was designed to handle statistical computing and graphics. It includes an integrated suite of big data tools for manipulation, calculation and visualization. Operating System: Windows, Linux, OS X.
1169. Ruby
Inspired by Perl, Smalltalk, Eiffel, Ada, and Lisp, Ruby calls itself "a programmer's best friend." While its usage has declined somewhat recently, it's still one of the twenty most popular programming languages. It's dynamic, object-oriented and designed to seem "natural." Operating System: Windows, Linux, OS X
1170. Terra
Terra is a C-like language that can interoperate with Lua, but it can also be used alone. It's useful for high-performance computing. Operating System: Linux, OS X
1171. TypeScript
Microsoft first released this JavaScript variant in 2012. It works with JavaScript libraries and compiles to JavaScript code, but adds static typing capabilities and improved scalability. Operating System: OS Independent

Project Management

1172. Achievo
This Web-based project management tool includes time-tracking and scheduling capabilities. It's available in more than twenty languages, and support is available through third-party partners. Operating System: Windows, Linux, OS X.
1173. dotProject
Another mature project, dotProject has been under development since 2000. Key features include an email-based trouble ticket system, hierarchical task list, discussion forum and more. Operating System: Windows, Linux
1174. GanttProject
Downloaded more than 20,000 times a week, GanttProject has been around since 2003. It allows users to create tasks and milestones, organize and prioritize tasks, create PERT charts and more. Operating System: Windows, Linux, OS X
This application combines project management capabilities and portfolio management capabilities in a single package. It comes in personal server (free), group server (free), enterprise server (paid) and enterprise cloud (paid) versions. Operating System: Windows, Linux, OS X
1176. openXprocess
A good option for development teams, openXprocess includes features designed for agile and scrum methodologies. The organization also offers paid training in agile and scrum, and paid support is also available. Operating System: Windows, Linux
1177. Plandora
Like openXprocess, Plandora is best for application or software development groups. Key features include time tracking, request management, customized reports, customized KPIs, dashboard gadgets, knowledge base, risk management, budget management, agile board, resource capacity, surveys, SVN integration, and Gantt charts. Operating System: OS Independent.
This award-winning alternative to Microsoft Project has been downloaded nearly 2 million times. It has a long list of users that includes IBM, Accenture, the U.S. Department of Energy, Cisco, ATI and AMD. Operating System: Windows, Linux, OS X
1179. Project.Net
This PPM tool has been included in Gartner's "Magic Quadrant for IT Project and Portfolio Management Applications." Paid support, enhancements and training are available. Operating System: OS Independent
1180. Redmine
Web-based Redmine offers Gantt charts, calendar, per-project wikis, an issue tracker, newsfeeds and more. It also integrates with most version control systems, making it a good choice for development teams. Operating System: OS Independent.
1181. Taiga
Still in beta trials, Taiga is a project management platform designed to support agile development principles. In addition to the open source download, the company also offers a hosted service that is currently free; they plan to begin charging subscription fees in January 2016. Operating System: Windows, Linux, OS X
1182. TaskJuggler
Designed for "serious project managers," TaskJuggler claims to be "more flexible and superior to the commonly used Gantt chart editing tools." Key features include an optimizing scheduler, resource balancer, consistency checker, accounting and reporting capabilities. Operating System: Windows, Linux, OS X.
1183. web2Project
Offering "real project management for real business," this Web-based tool can manage multiple projects, companies, departments and users. Key features include a modular infrastructure, built-in security, role-based permissions, project- and group-wide Gantt charts, and group calendar. Operating System: OS Independent.

RAID Controllers

1184. Mdadm
Built into the Linux kernel, mdadm makes it easy to create, manage and monitor storage arrays. It can also move spares between RAID arrays. Operating System: Linux
1185. Raider
With Raider, you can convert any Linux disk into a RAID array with software RAID 1, 4, 5, 6 or 10. It works with many of the most popular Linux distributions, including Ubuntu, Debian, OpenSUSE, Fedora, Linux Mint and others. Operating System: Linux
1186. RaidEye
RaidEye isn't so much a tool for creating RAID devices as for monitoring RAID volumes. It works with the AppleRAID software built into OS X. Operating System: OS X
1187. Salamander
Created to help Ubuntu users implement RAID on their systems, Salamander is a modified version of the standard Ubuntu installer. The name comes from the fact that it can regenerate data after a hard-drive failure the same way that salamanders can regrow limbs. Operating System: Linux
1188. SnapRAID
SnapRAID arrays can recover from up to six disk failures. The tool was built for home media servers or other environments with a lot of big files that rarely change. Operating System: Windows, Linux, OS X

Religion

1189. BibleTime
Top-of-the-line Bible study tools like Logos can cost hundreds or even thousands of dollars, but BibleTime offers many of the same capabilities for free. It provides searchable access to more than 200 Bibles, commentaries and related resources. Operating System: Windows, Linux, OS X
1190. Gnaural
It already does everything else--now your computer or smartphone can help you meditate. Using something called the “binaural beat principle,” Gnaural generates audio tones designed to get you in the right frame of mind for relaxation. Operating System: Windows, Linux, OS X
1191. Noor
Noor doesn’t offer a lot of bells and whistles, but it does let you access the text of the Quran from your PC. It includes both the original Arabic and translations. Operating System: OS Independent
1192. Xiphos
Xiphos provides access to the same Biblical texts and resources as BibleTime—it just has a different interface. It also provides the capabilities for users to create their own modules such as journals, prayer lists and personal commentaries that they can share with friends. Operating System: Windows, Linux
1193. Zekr
This app provides access to the Quran and commentaries in a number of different translations. It's completely free and open source because its developers follow a very simple rule: "Never Profit Off The Prophet." Operating System: Windows, Linux, OS X

Remote Access/VPN

Are you a help desk worker or do your parents call you a lot for help with their computers? This tool allows you to view and control desktop screens from your Android device. To use it, you will also need a VNC server like TightVNC, RealVNC, x11vnc or Apple Remote Desktop. Operating System: Android
1195. OpenVPN
Connect to your network securely using OpenVPN. It's available as a paid enterprise solution, a free download or as a cloud-based service. Operating System: Windows, Linux, OS X, Android, iOS.
This VPN client allows you to connect to your corporate server or other VPN server from your Android device. It's a great tool for securely accessing enterprise networks. Note that in order to use it, you will also need a VPN server tool, such as OpenVPN. Operating System: Android
1197. TightVNC
This remote control application allows users to interact with a system in one location while using a system in another location. In addition to its telecommuting uses, it's also useful in many help desk situations. Operating System: Windows, Linux
1198. UltraVNC
UltraVNC offers similar capabilities as TightVNC. Key features include file transfer, video driver, optional encryption plugins, MS logon, text chat, viewer toolbar, viewer auto scaling, multiple monitor support, auto reconnection and more. Operating System: Windows

Recipe Management

1199. Gourmet
Gourmet helps you organize your recipes. It imports recipes from multiple formats, including websites, plus it generates shopping lists and counts the calories in the meals you're making. Operating System: Windows, Linux

Report Authoring

1200. WIKINDX
WIKINDX combines tools for tracking bibliographic information with tools for collaboratively authoring papers. It can be deployed on a single system or on a Web server, and it knows how to format entries for the most popular style guides, including the Chicago Manual, APA and others. Operating System: OS Independent
1201. Zotero
Zotero stores research information where you found it—in your browser. It's a Firefox plug-in that automatically collects and organizes your research so that you can easily search it later. Operating System: OS Independent

Robotics

1202. ROS
Short for "Robot Operating System," ROS offers a set of open-source libraries for controlling robots. It includes device drivers, libraries, hardware abstraction and other capabilities. Operating System: Linux, OS X

School Administration

1203. Akura
Akura was designed for a "college" (which equates to a K-12 school in the U.S.) in Sri Lanka and serves many Asian institutions. It's won many awards, and it's particularly popular with religious schools. Operating System: Windows, Linux.
1204. OpenAdmin
Popular with schools around the world, OpenAdmin has been downloaded more than 29,000 times. It's Web-based and can be used for a single school or to manage multiple schools within a district. Operating System: OS Independent.
1205. Open-School
This web-based school management system "focuses on excellence and evolution in the field of education" with an emphasis on supporting the latest trends. It comes in both a free, open source version and a paid, supported edition. Operating System: Windows, Linux, OS X.
1206. openSIS
This open source school management software claims to increase student achievement and teacher performance. It is available in the open source version, a Pro version for small to medium-sized districts, and a highly scalable, cloud-based Surge version for large districts. Operating System: OS Independent.
1207. SchoolTool
Designed for schools in the developing world, SchoolTool runs on Ubuntu and has been translated into numerous languages. The latest update can track skills, outcomes and standards, which is helpful for complying with regulations in many areas. Operating System: Linux.

Science

1208. OpenBEL
Although the project was originally begun by Selventa, the Linux Foundation now manages this effort aimed at creating a programming language "representing scientific findings in the life sciences in a computable form." The BEL part stands for Biological Expression Language. The project includes a framework, an editor and a navigator. Operating System: Linux
This is another example of the open source movement spreading beyond software. It's an open science effort to find a cure for malaria. It's hosted on GitHub, and anyone can contribute. Operating System: OS Independent
1210. OpenWorm
This unusual project is dedicated to building the first digital life form—a virtual version of the C. elegans nematode. They have code for several projects available through GitHub, or you can contribute simply by joining in on a Google Hangout discussion. The entire project (as well as the code) is guided by open source principles. Operating System: OS Independent

Screenplay Writing

1211. Celtx
Celtx bills itself as an "all-in-one system for video and movie planning." The main website primarily promotes the online service, but it is still possible to download the source code for the open source version. Operating System: Windows, Linux, OS X

Small Business Server

1212. ClearOS
ClearOS calls itself a "next-generation small business server." It incorporates networking, VPN, server capabilities, and enterprise-grade security into a single package with an easy-to-use Web-based interface. It serves a long list of well-known customers, including Google Maps, Cadillac, Samsung, Toyota, Hilton Worldwide, Xerox, Chevrolet, Massachusetts Institute of Technology, Princeton University, Greenpeace and the Boys & Girls Clubs of America.
The ClearOS software is available in several different editions. The Home and Business editions are available with a paid subscription, or you can download the Community edition for free. The company also offers a wide variety of pre-configured hardware appliances with prices ranging from $1,199.00 to $34,832.17. In addition, it also offers paid support packages. Operating System: Linux.
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Based on the CentOS distribution of Linux, SMEServer is designed for small and medium enterprises. Key features include a file and print sharing, email server, firewall, remote access, RAID storage, backup, remote access and more. Operating System: Linux.

Social Networking

1214. BuddyPress
Made by the WordPress team, BuddyPress offers "social networking in a box." Its used by thousands of organizations to create social networks for a variety of different groups. Operating System: OS Independent
1215. Diaspora
If you'd rather avoid the potential privacy problems on Facebook by avoiding the social network altogether, you might want to check out Diaspora. It's an open source social network designed with privacy in mind. Operating System: OS Independent
Similar to BuddyPress, LiveStreet is a content management system for creating blogs or social networks. It boasts easy installation, extensibility and multilingual functionality. Operating System: Linux
1217. Lunchbox
NPR created this suite of tools to make it easier for journalists to share images on social media. It includes three tools: Waterbug, which creates watermarked, attributed images; Factlist, which creates a bulleted list of points about news stories; and Quotable, which turns newsworthy quotes into images. All can be customized to suit different organizations. Operating System: Windows, OS X

Software-Defined Networking (SDN)

1218. Mcrouter
Mcrouter was first released by Facebook on September 15, 2014. The company describes the project as "a memcached protocol router that is used at Facebook to handle all traffic to, from, and between thousands of cache servers across dozens of clusters distributed in our data centers around the world." It can reportedly handle up to 5 billion requests per second. Operating System: Linux.
Open Daylight describes itself as "an open platform for network programmability to enable SDN and NFV for networks at any size and scale." Its first release is called Hydrogen, and it comes in three versions: Base, Virtualization and Service Provider. Operating System: Linux.

Speech

1220. eSpeak
Although not as human-sounding as some other text readers, eSpeak provides clear audio of the text on your screen. It supports dozens of different languages, as well as several different English accents. Operating System: Windows, Linux, OS X

Storage

1221. Btrfs
A joint project supported by Facebook, Fujitsu, Intel, the Linux Foundation, Netgear, Novell, Oracle, Red Hat and others, Btrfs is a copy on write (CoW) filesystem for Linux. It focuses on "fault tolerance, repair and easy administration." Operating System: Linux
1222. Ceph
Owned by Red Hat, Ceph combines object and block storage capabilities. It's a distributed storage solution that boasts excellent performance, scalability and reliability. Operating System: Linux
1223. CoprHD
CoprHD is an open-source version of EMC's ViPR Controller. According to the website, it "enables management and automation of storage resources for block and file storage platforms." Operating System: Linux
1224. DRBD
DRBD is an open source solution for building high-availability storage clusters based on RAID-1. Commercial products based on the same technology are available through LinBit. Operating System: Linux
1225. Ext4
Included in most popular Linux distributions, Ext4 supports file systems up to 1 EB in size with up to 16 TB per file. Other key features include extents, multiblock allocation, delayed allocation, Fast fsck, journal checksumming and more. Operating System: Linux
1226. FreeNAS
This open source network attached storage (NAS) software says it is "loved by" the United Nations, Disney Interactive Media Group, Reuters and Dr. Phil. It can be installed on nearly any hardware, and &TrueNAS offers pre-built appliances based on the technology. Operating System: FreeBSD
1227. Gluster
Gluster is a highly scalable network filesystem that is suitable for cloud computing environments. Red Hat offers a paid product based on the technology, and its users include Casio and Intuit. Operating System: Linux
1228. IPFS
Short for "Interplanetary File System," IPFS is an unusual project that uses peer-to-peer technology to connect all computers with a single file system. According to the project owner, "In some ways, IPFS is similar to the Web, but IPFS could be seen as a single BitTorrent swarm, exchanging objects within one Git repository." Operating System: OS Independent
Backed by companies like EMC, Seagate, Toshiba, Cisco, NetApp, Red Hat, Western Digital, Dell and others, Kinetic is a Linux Foundation project dedicated to establishing standards for a new kind of object storage architecture. It's designed to meet the need for scale-out storage for unstructured data. Operating System: Linux
A Red Hat Emerging Technology Project, Libvirt is a storage pooling and virtualization API. Check out the website for a list of applications developed using the API. Operating System: Linux
1231. Lustre
Intended to support high-performance computing (HPC) environments, Lustre is another highly scalable file system. Some of its earliest adopters included the national laboratories at Lawrence Livermore, Sandia, Oak Ridge and Los Alamos. Operating System: Linux
1232. NAS4Free
Another option for DIY NAS, NAS4Free claims to be "the simplest and fastest way to create a centralized and easily-accessible server for all kinds of data easily accessed with all kinds of network protocols and from any network." Key features include the ZFS file system, software RAID (levels 0, 1 or 5) and disk encryption. Operating System: FreeBSD
1233. OHSM
Short for "Online Hierarchical Storage Manager," OHSM can automatically move data between high- and low-cost media depending on how often it has been accessed. It allows enterprises to set up and enforce policies for where storage should be allocated and when it should be relocated. Operating System: Linux
1234. openAttic
OpenATTIC aims to be "the only storage system you'll ever need" and provides software-defined storage capabilities. It can unify cloud and on-premise storage and it can connect NFS, CIFS or iSCSI clients with FibreChannel ESX or OpenStack KVM hosts. Operating System: Linux
1235. Openfiler
Openfiler aims to combine the best features of NAS storage with the best features on SAN storage. Its users include Motorola, Pratt & Whitney, Bill Me Later and the London Metropolitan Police. A paid commercial edition is available. Operating System: Linux
Based on Debian Linux, OpenMediaVault was designed to provide NAS for home users or small offices. It offers a Web-based administration console and includes software RAID capabilities. Operating System: Linux
1237. OpenSMT
This is another option for building your own NAS/SAN appliance—this time based on OpenSolaris. It uses the ZFS file system. Operating System: OpenSolaris
1238. openvStorage
This software-defined storage solution promises "zero downtime, zero touch, zero backup, zero copy, zero overhead and zero technology lock-in." It's being used by several storage vendors around the world. Operating System: Linux
1239. oVirt
With oVirt, IT can manage virtual machines, virtualized networks and virtualized storage via an intuitive Web interface. It's based on the KVM hypervisor. Operating System: Linux
Storj (pronounced "Storage") is a new type of cloud storage built on blockchain and peer-to-peer technology. The DriveShare app allows users to rent out their unused hard drive space for use by the service, and the MetaDisk Web app allows users to save their files to the service securely. It is currently in beta testing. Operating System: Windows, Linux, OS X
This project offers images for setting up Linux-based servers for a variety of purposes, including a simple NAS device. There are also options for content management, ecommerce, bug tacking, collaboration, Web servers, messaging and more. Operating System: Linux
1242. ZFS
Also incorporated into many Linux distributions, ZFS is another highly scalable file system. Originally developed for Sun Solaris, it is now owned by Oracle. It includes compression, protection against data corruption, snapshots, RAID support and more. Operating System: Solaris, OpenSolaris, Linux, OS X, FreeBSD

Systems Administration Tools

This IBM tool helps monitor log data for cloud and containerized environments. It provides visibility into what is happening with systems and enables analytics. It's one of the many projects include in IBM's developerWorks Open website. Operating System: Linux, OS X
1244. Ansible
Now owned by Red Hat, Ansible describes itself as "a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchestration, and many other IT needs." Technology firms that use it include Cisco, Juniper Networks, Evernote, Twitter, Verisign, GoPro, EA Sports, Atlassian and Verizon. It comes in both free and paid versions. Operating System: Linux
1245. Chef
Another automation tool, Chef supports DevOps practices while improving speed, collaboration and security. Free and paid versions are available. Its website lists Target, Nordstrom, Facebook, Etsy, IGM, Yahoo and Bloomberg among its users. Operating System: Windows, Linux, OS X
1246. Difio
Difio tracks the open source code behind your applications. When that code changes, it lets you know what's different so that enterprise IT can make informed decisions about upgrading to the latest version. Supported languages include Python, Ruby, PHP, Perl, Node.js and Java. Operating System: Linux.
1247. Hudson
Popular with enterprises using Agile and DevOps practices, Hudson is an extensible continuous integration server that can monitor the execution of repeated jobs. The project is sponsored by The Eclipse Foundation, Oracle, Atlassian and YourKit. Operating System: OS Independent
Designed for IT administrators, this Microsoft project helps manage cloud computing servers at the rack level. It's part of the Open Compute Project. Operating System: Windows.
1249. OSQuery
Developed by Facebook, OSQuery makes it possible for sysadmins to monitor hardware performance using interactive SQL queries. It's ideal for intrusion detection, tracking infrastructure reliability or ensuring compliance. Operating System: Linux, OS X
1250. Packer
This tool allows IT staff to create identical machine images that can be deployed on multiple platforms. Microsoft's GitHub repository includes plug-ins for using Packer with Azure and Hyper-V. Operating System: Windows, Linux, Unix, OS X.
1251. Puppet
The "most widely used open source IT management system," Puppet includes more than 40 open source projects for infrastructure management. It comes in a paid enterprise version as well as the open source edition. It boasts that its users include more than 25,000 enterprises, such as Disney, Walmart, 1-800-Flowers.com, Heartland Payment Systems, Getty Images and Yelp. Operating System: Windows, Linux, Unix, OS X
1252. SaltStack
Another option for IT operations automation, Salt calls itself "the most intelligent, powerful and flexible open source software for remote execution, configuration automation, cloud control and event-driven orchestration." First released in 2012, it's used by tens of thousands of organizations, and it has won numerous awards, including the Best of VMworld 2014 award for virtualization management, an InfoWorld 2014 Technology of the Year Award, and being named a Gartner Cool Vendor in DevOps in 2013. The open source version is often referred to as Salt Open, and it also comes in a paid enterprise version called SaltStack Enterprise. Operating System: Windows, Linux, Unix, OS X.
1253. Serverspec
If your organization uses Puppet, Chef, CFEngine or another configuration management tool, Serverspec can double-check to make sure your servers are configured the way you want them to be. It's currently a beta release with a second beta due in October. Operating System: Linux.
1254. Webmin
This interface allows you to set up Unix user accounts, change passwords, and perform other system admin tasks from any Web browser. You can perform more than 100 different functions. Operating System: Unix
1255. Zabbix
This enterprise-class systems monitoring solution can keep track of up to one million metrics on up to 100,000 devices. Microsoft recently released a plug-in for using Zabbix to monitor Azure deployments. Operating System: Windows, Linux, OS X.

Text Editors

1256. ATPad
Designed for developers who prefer working in a text editor rather than a full-fledged IDE, ATPad offers a tabbed environment, line numbering, bookmarks, a snippet system, unlimited undo/redo and more. Operating System: Windows.
1257. CodeMirror
JavaScript-based CodeMirror makes it possible to embed a text editor in a Web browser. It supports more than 90 languages with autocompletion, code folding, bracket and tag matching, and more. Operating System: OS Independent
1258. Edhita
If you've ever wanted to write code from your iPhone or iPad, Edhita can help. It's a text editor written in Swift. Operating System: iOS
1259. Emacs
Since the 1970s, generations of developers have used Emacs for writing code. It offers content-sensitive editing, syntax coloring, full Unicode support, customization capabilities and a large library of extensions. Operating System: Windows, Linux, OS X
1260. jEdit
This Java-based text editor supports more than 200 programming languages. It includes a built-in macro language with hundreds of pre-written macros and extensions available. Operating System: OS Independent
1261. Notepad++
Based on Scintilla, Notepad++ was updated earlier this month with a new Ghost typing feature. Other capabilities include syntax highlighting and folding, a customizable GUI, document map, auto-completion, tabbed interface, WYSIWYG printing, bookmarking, macros and more. Operating System: Windows
1262. TEA
This fast, cross-platform text editor boasts hundreds of supported functions. Despite its lightweight size, it includes a spellchecker, tabbed layout, syntax highlighting for dozens of languages, support for code snippets and templates, bookmarks, a calendar and more. Operating System: Windows, Linux, OS X
1263. Textmate
For Macs only, this text editor says it wants to bring code and markup into the 21st century. Note that it is open source but not necessarily free; commercial licenses are sold on the site. Operating System: OS X
1264. Vim
Vim is a mature text editor with many die-hard fans and a long-time rivalry with Emacs. It's highly configurable and is sometimes called a "programmer's editor" because it has many of the features of full IDEs. It is charityware, so those who use it are asked to donate to an organization that helps needy children in Uganda. Operating System: Windows, Linux, OS X
This fast, lightweight editor is good for just one thing—writing valid XML code. It features syntax highlighting, folding, tag completion, spell and style check and import and export from Microsoft Word. Operating System: Windows, Linux
1266. Zile
Short for "Zile is Lossy Emacs," Zile is a small text editor that looks very similar to the popular Emacs editor. It packs many features into just 100KB, including multi-level undo, multi-window display, killing, yanking, register, and word wrap. Operating System: Linux/Unix

Time Tracking

Based on TimeTracker+, this tool helps freelancers, contract workers and other professionals keep track of the time they spend on various projects. It comes in four languages in addition to English. Operating System: Android
1268. eHour
This web-based tool tracks projects, clients and time spent, making it easy to generate invoices. It's a good option for freelancers, SMBs and teams within a larger organization. Operating System: Windows, Linux, OS X
1269. TimeTrex
The latest version of this employee time tracking system includes a facial recognition feature that allows workers to clock in just by looking at a smartphone or tablet. Besides the open source version, it comes in professional, corporate or enterprise versions, and cloud hosting is available. Operating System: Windows, Linux, OS X.
1270. Todomoo
Todomoo combines a hierarchical task manager with a time tracker that allows you to bill for your time on multiple projects. It's also available in a portable edition that you can run from a USB drive. Operating System: Windows

To-Do Lists/Schedulers/Calendars

This open source iOS app makes it easy to track your to-do list on the go. The app is free for one or two lists, but requires a subscription for additional lists—or you can download the source code and create your own similar app. Operating System: iOS
1272.Makagiga
Makagiga offers the same schedule/journal functionality as RedNotebook, plus it adds a sticky notes widget and a feedreader. Other optional add-ons are also available. Operating System: Windows, Linux
Another note-taking option, NoNonsense Notes aims to be simple and beautiful. Key features include to-do lists, notifications, widget support, password support, synchronization with Google Tasks and more. Operating System: OS Independent
1274. Omni Notes
This popular and highly rated note-taking app is both simple and lightweight. However, it doesn't skimp on features and includes tools like batch editing, full-text search, sorting and Google Now integration. Operating System: OS Independent
1275. Open Tasks
OpenTasks features a clean, Material-Design based interface and provides basic task management capabilities. The developer has many more advanced features planned, but the app is already very useful. Operating System: OS Independent
1276. RedNotebook
A free alternative to Evernote, RedNotebook combines a calendar, journaling and word clouds. Features include hashtag support, spell-check, live search, automatic saving, templates, export and more. Operating System: Windows, Linux
1277. Task Coach
This to-do list manager comes in both desktop and mobile versions. It can handle composite tasks, and includes effort tracking and categorizing features. Support is free. Operating System: Windows, Linux, OS X, iOS, Android
1278. Ted
This app has nothing to do with Ted Talks or with the movie Ted. Instead, it's a simple, lightweight text editor. It's meant for typing short files, not for writing code. Operating System: Android
1279. ThinkingRock
This app helps you put into practice the "Getting Things Done" methodology featured in books by David Allen. Different screens help you collect your thoughts, process thoughts, then organize, review, and do. Operating System: Windows, Linux

Transit

This project aims to make it easy for government entities to communicate information about public transit schedules, walking and biking routes and other travel-related information. Portland's TriMet, one of the sponsors of the project, currently has a working demo of the software in action. Operating System: OS Independent

Typeface

1281. Font Awesome
Developed for Bootstrap, Font Awesome is a set of icons related to Web activities. They're vector graphics (meaning they're easy to scale) and they look good on high-resolution screens. Operating System: OS Independent
1282. Hack
Released earlier this year, Hack is an open source typeface designed for use in writing source code. It aims to make it easy to distinguish between similar characters like 0/O and 1/l, event at very small sizes. Operating System: OS Independent
1283. Roboto
Roboto is the font that Google uses for Android and ChromeOS, and the company released it under an open source license earlier this year. It's also the recommend font for developers who want to build apps that support Google's Material Design. Operating System: OS Independent

Typing

1284. Klavaro
Humble Klavaro describes itself as "just another free touch typing tutor program," but it's actually quite unique for its keyboard- and language-independent operation. In addition to the familiar "QWERTY" keyboard layout, it supports six other built-in layouts, or you can use the keyboard editor to create your own. It's also available for 25 different languages, making this a good choice for users outside the U.S. Operating System: Windows, Linux

Utilities

1285. Coffee
This helpful app keeps your system "awake" during downloads, file transfers, etc. It's very helpful if you don't want your system going into standby mode while it completes a particular activity. Operating System: Windows
1286. Copy Handler
CopyHandler improves on the built-in file moving and copying features in Windows, adding task queuing, filtering, pause, resume and other features. It's highly customizable and makes it easier to clean up or organize stored files. Operating System: Windows.
1287. HDGraph
Wondering how in the world you managed to fill up 300 GB worth of hard drive space? HD Graph lets you see the reasons in a flash by drawing a multi-level pie chart that details how much space each directory and subdirectory is consuming. Operating System: Windows
1288. KShutdown
Need to turn off, turn on, or restart your computer at a later time? This app lets you schedule all those functions so they happen automatically and adds several other features as well. Operating System: Windows, Linux
1289. QEMU
This emulator can run applications made for any operating system on any other operating system. In other words, you can use it to run Windows XP software on Linux systems or to run Linux applications on Windows (in case you want to try them out before you install Linux on your hard drive). It's best for more experienced users; less technically savvy folks should probably stick with Wine.
1290. UltraDefrag
Need to defrag your hard drive? Unlike the defragmenter tool that comes with Windows, UltraDefrag lets you defrag on startup for maximum speed. You can also configure it to shut down your system when it's finished, so you can leave it working at night after you go to bed. Operating System: Windows
1291. WINE
WINE (which stands for "Wine is not an emulator") allows users to run Windows programs on Unix-based systems, including Linux distributions and OS X. It offers very fast performance and excellent stability. A supported version known as Crossover Linux is also available for sale.

User Authentication

1292. WiKID
WiKID promises to take the hassle out of two-factor authentication. The link above will take you to the free community version, but the company also offers paid products. Operating System: OS Independent.

Version Control

1293. Bazaar
Managed by Canonical, Bazaar is used by a lot of open source projects, including Ubuntu, the GNU Foundation, the Linux Foundation, MySQL, Bugzilla, Debian and Maria DB. It's easy to learn, supports any workflow and workspace model, and promises high storage efficiency and speed. Operating System: Windows, Linux, OS X
1294. Git
This version control system has become incredibly popular thanks in part to the growing use of the GitHub service. Companies and projects that use it include Google, Facebook, Microsoft, Twitter, LinkedIn, Netflix, Perl, PostgreSQL, Android, Rails, QT, Gnome and Eclipse. Operating System: Windows, Linux, OS X
1295. Mercurial
Mercurial is a distributed source control management tool focused on helping teams work together more easily and more quickly. Its users include large projects like OpenJDK and NetBeans. Operating System: Windows, Linux, OS X
1296. Subversion
Supported by Apache, this enterprise-class version control system was first released in 2000. Organizations that use it include the Apache Software Foundation itself, Hobby Lobby, Mono, Plone and GNU Enterprise. Operating System: Windows, Linux, OS X
1297. TortoiseSVN
For Windows only, TortoiseSVN is based on Subversion but provides an alternative, easy-to-use interface. It works with any type of file and any IDE. Operating System: Windows

Video Tools

1298. Aegisub
This free tool focuses on making it fast and easy to create or edit subtitles. It includes built-in real-time preview capabilities. Operating System: Windows, Linux, OS X.
AHD creates subtitles automatically without the need for scripts. It provides "an extensive range of editing options and a large list of subtitle formats." Operating System: Windows.
1300. Amara
This award-winning app aims to make it easier to create subtitles and translations for digital video. In addition to the open source subtitling software, the project also sponsors a collaborative subtitling website and an open protocol for subtitles. Operating System: Windows, Linux, OS X.
1301. Avidemux
While less full-featured than some of the other options on our list, Avidemux handles simple editing, filtering and encoding tasks with ease. It also offers some automation capabilities, including a job queue. Operating System: Windows, Linux, OS X
Subtitle Workshop supports more than 60 different formats and has an easy-to-use interface. Key features include style tags, integrated video player, multiple undo/redo and multi-language support. Operating System: Windows.
1303. Cinelerra
Downloaded more than a million times, Cinelerra is a full-featured video editing suite, and it boasts that it was the world's first free 4K editor. Key features include real-time processing, render farm support, floating point imaging, 64-bit compliance, support for most codecs and more. Operating System: Linux
1304. DVD Flick
DVD Flick boasts support for more than 45 file formats, more than 60 video codecs and more than 40 audio codecs. It can burn DVDs, create menus and add subtitles. Operating System: Windows.
1305. DVDx
With DVDx, users can copy most DVDs and Blu-ray discs to their hard drives. It can also transcode movies from one format to another, reformat video with an incorrect aspect ratio, add or remove subtitles, extract audio and remove letterbox black borders from movies. Operating System: Windows, Linux, OS X.
1306. FFDShow
This codec decodes numerous file formats. It provides excellent video quality while consuming few computing resources. Operating System: Windows
1307. HandBrake
HandBrake is a free tool for converting video files using a wide variety of codecs. It promises fast, simple, easy operation. Operating System: Windows, Linux, OS X.
1308. Hyperlapse
This tool uses Google Street View images to creating time-lapse videos that also move from one location to another. The results can be truly amazing. You can play with the tool online or download the code to incorporate similar capabilities into your own website. Operating System: OS Independent
1309. Jubler
Winner of several awards, Jubler can author new subtitles or edit, convert, transform or correct existing subtitles. It supports most popular subtitle formats. Operating System: Windows, Linux, OS X.
Kaltura is home to a number of video-related projects, including a player, editor, widgets, processing, and much more. Their latest release is a Joomla extension that makes it easy to add video to your Joomla-based Web site. Operating System: OS Independent.
1311. Kdenlive
This video editing tool describes itself as "an intuitive and powerful multi-track video editor, including most recent video technologies." An update was released in August with new features like OpenGL support, an improved color correction interface, and a new effect preview capability. Operating System: Linux, OS X
1312. LiVES
LiVES can be used to edit regular video or to create professional VJ performances. It supports the latest standards and is frame- and sample- accurate. Operating System: Windows, Linux, OS X.
Suitable for amateurs and hobbyists as well as more advanced users, OpenShot is a simple but powerful video editing tool. Its capabilities include 3D animation, curve-based camera motion, compositing, transitions, audio mixing, vector titles, subtitles, special effects, chroma-key and more. Operating System: Linux, OS X
If you're looking to create a slideshow video for a wedding, graduation, anniversary or other special event, PhotoFilmStrip is a good option. It supports HD video and offers the "Ken Burns" effect where the camera pans across the photos. Operating System: Windows, Linux.
1315. Pitivi
The developers behind this video editing tool want to allow "everyone on the planet to express themselves through filmmaking, with tools that they can own and improve." It boasts a beautiful interface and hundreds of animated effects, transition and filters. Operating System: Windows, Linux, OS X, others
With support for more than 60 different subtitle formats, Subtitle Workshop is a versatile, easy-to-use subtitle creator and editor. It supports style and color tags, and it includes an integrated video player. Operating System: Windows.
1317. VirtualDub
Another streamlined option, VirtualDub is a Windows-only tool for video capture and processing. It is primarily useful for cleaning up AVI files. Operating System: Windows.
This tool allows you to download clips from more than 93 different websites, including YouTube, Yahoo Video, Vimeo, Boing Boing and others. It can also convert clips among popular formats. Operating System: Windows, Linux, OS X.

Virtualization

1319. KVM
Short for "kernel-based virtual machine," KVM is a full virtualization stack for Linux systems. It is included in the mainline Linux kernel. Operating System: Linux.
1320. MidoNet
Released under an open source license last November, MidoNet is highly scalable network virtualization software. It is designed for use in cloud computing environments, particularly those running OpenStack. Operating System: Linux
1321. OpenVZ
OpenVZ takes a different approach to virtualization: unlike VMware, VirtualBox and many other virtualization solutions which use VMs, OpenVZ offers container-based virtualization through VEs or VPSs. Commercial products based on OpenVZ are sold as Parallels Virtuozzo Containers. Operating System: Linux
1322. VirtualBox
VirtualBox offers virtualization for x86 and AMD64/Intel64 servers and desktops. Pre-built VirtualBox appliances are available for download from Oracle. Operating System: Windows, Linux, OS X, Solaris, others
1323. Xen
Xen boasts that it powers "the largest clouds in production," including those run by Amazon Web Services and Rackspace. It is a Linux Foundation Collaborative Project, and it has been integrated into many other open source cloud computing projects, including OpenStack. Operating System: OS Independent.

Vulnerability Assessment

1324. Metasploit
The "world's most used penetration testing software," Metasploit is well-known as a vulnerability assessment tool. The website also includes a lot of general information about penetration testing and security. Operating System: Windows, Linux.
1325. Nikto
Easily scan your Web server for more than 6700 potentially dangerous files and programs. It also checks for insecure configurations and outdated software. Operating System: Windows, Mac, Linux, Unix, BSD.
1326. Nmap
This popular network mapper has been featured in numerous movies, including Elysium, G.I. Joe: Retaliation and The Matrix. In addition to helping with security audits, it's also useful for network management purposes. Operating System: Windows, Linux, OS X.
1327. OpenVAS
OpenVAS claims to be "the world's most advanced open source vulnerability scanner and manager." It provides a framework for vulnerability management and more than 33,000 vulnerability scans. Operating System: Windows, Linux, OS X.
Also known as ZAP, this penetration testing tool is easier to user than some of the other options, making it a good choice for those who are new to this type of security testing. It's an award-winning tool designed to find vulnerabilities in web applications. Operating System: Windows, Linux, OS X.
1329. Samurai
Samurai is a Linux-based live CD that brings together many different penetration testing tools in a single framework. It includes resources for reconnaissance, mapping, discovery and exploitation. Operating System: Linux.
1330. w3af
This Web application security auditing framework searches for more than 200 different kinds of vulnerabilities, includes cross-site scripting, PHP misconfiguration and SQL injection. Numerous add-ons are available. Operating System: Windows, Linux.
1331. Wapiti
Another option for finding vulnerabilities in Web applications, Wapiti does black box scanning of apps. It can detect XSS, SQL and XPath injections, file inclusions, command execution, XXE injections, CRLF injections and other security flaws. Operating System: Windows, Linux, OS X.

Web Filtering

1332. DansGuardian
DansGuardian filters out objectionable content using phrase matching, PICS filtering and URL filtering. It allows users to customize the settings to block as much or as little as desired. Operating System: Linux, OS X.

Website Editors

1333. Amaya
Managed by the World Wide Web Consortium (W3C), Amaya integrates web browsing and editing. It supports HTML, CSS, XML, and some related tools like XHTML, MathML and SVG. Operating System: Windows, Linux, OS X
1334. Aptana
A better option for professional Web application developers, Aptana supports HTML5, CSS3, JavaScript, Ruby, Rails, PHP and Python. It also offers Git integration and easy deployment to Heroku or EngineYard. Operating System: Windows, Linux, OS X
1335. Bluefish
Aimed at developers creating more advanced Web applications, Bluefish supports numerous programming languages. It boasts fast startup and performance, the ability to open hundreds of documents at once, project support, powerful search and replace, snippets sidebar, unlimited undo/redo, programming language-aware spell checker and more. Operating System: Windows, Linux, OS X
1336. BlueGriffon
Like SeaMonkey, BlueGriffon is also powered by Firefox's rendering engine. It includes a WYSIWYG content editor that simplifies the process of creating websites. Operating System: Windows, Linux
1337. Firebug
If you're comfortable editing code, Firebug is a fabulous tool for editing your Web pages live. It integrates with Firefox and makes it easy to search, edit, and find errors in your HTML, CSS, or JavaScript. Operating System: Windows, Linux, OS X
1338. Kompozer
This "complete web authoring system" offers a WYSIWYG page editor or the option to directly in the page code. It's a good option for beginners as well as more advanced Web developers and designers. Operating System: Windows, Linux, OS X
1339. SeaMonkey
In addition to Webpage editing, this complete Internet suite also includes a browser, email client, IRC chat and more. Closely aligned with Mozilla, it is based on a lot of the same code as the Firefox browser and Thunderbird email application. Operating System: Windows, Linux
For XML only, this editor is lightweight and fast. It validates your code as you type and offers a simple, basic interface. Operating System: Windows, Linux

Web Servers

Now more than 20 years old, Apache claims to have been the most popular Web server on the Internet since 1996. According to W3Techs, it currently powers 55.3 percent of all websites. Operating System: Windows, Linux, OS X
1342. AppServ
The goal of the App Serv project is simple: allow users to set up a Web server with Apache, MySQL and PHP in one minute or less. Note that this project originated in Thailand so some of the English documentation reads a little strange. Operating System: Windows, Linux
1343. EasyPHP
EasyPHP lets you set up a WAMP (Windows, Apache, MySQL and PHP) environment on a system or a thumb drive in just minutes. It also includes optional modules for WordPress, Spip, PrestaShop, Drupal, Joomla, and other apps. Operating System: Windows
1344. Nginx
Also extremely popular, Nginx (pronounced like engine X) is used by about a quarter of all the websites on the Internet. Its users include Netflix and WordPress.com, as well as many high-traffic sites in Russia. Operating System: Windows, Linux, OS X
1345. XAMPP
Most of them time when you want to install the Apache Web server, you'll also need other tools, like MySQL, PHP and Perl. This group of downloads bundles together all of those tools—along with a variety of other open source software that's helpful for running a Web server—in an easy-to-deploy package customized for each of the major operating systems. Operating System: Windows, Linux, OS X, Solaris

 

 

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3 comments:

Anonymous said...

I would advise you to expand your list with one more open source system. It is a PIM (product information management) system that enables you to manage and enrich your company product information. An example of such a sytem can be TreoPIM: https://treopim.com/

June 3, 2019 at 8:14 PM
Anonymous said...

Great lists. You are however missing FogBugz: https://www.fogbugz.com from your list of bug trackers.

July 4, 2019 at 6:48 PM
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September 13, 2019 at 10:09 AM

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