Software using the GNU General Public License

Chamilo is a free software (under GNU/GPL licensing) e-learning and content management system, aimed at improving access to education and knowledge globally. It is backed up by the Chamilo Association, which has goals including the promotion of the software, the maintenance of a clear communication channel and the building of a network of services providers and software contributors.

SpatiaLite is a spatial extension to SQLite, providing vector geodatabase functionality. It is similar to PostGIS, Oracle Spatial, and SQL Server with spatial extensions, although SQLite/SpatiaLite aren't based on client-server architecture: they adopt a simpler personal architecture. i.e. the whole SQL engine is directly embedded within the application itself: a complete database simply is an ordinary file which can be freely copied and transferred from one computer/OS to a different one without any special precaution.

utility used in the GNOME desktop environment for taking screenshots

BlueSpice is free wiki software based on the MediaWiki engine and licensed with the GNU General Public License. It is especially developed for businesses as an enterprise wiki distribution for MediaWiki and used in over 150 countries.

GNU Dr. Geo is an interactive geometry software that allows its users to design & manipulate interactive geometric sketches, including dynamic models of Physics. It is free software (source code, translations, icons and installer are released under GNU GPL license), created by Hilaire Fernandes, it is part of the GNU project. It runs over a Morphic graphic system (which means that it runs on Linux, Mac OS, Windows, Android). Dr. Geo was initially developed in C++ with Scheme scripting, then in various versions of Smalltalk with Squeak, Etoys_(programming_language) for One Laptop per Child Phar

Open Source 68k Macintosh emulator

Japanese Kanji learning software

distributed revision control system

thumb|Bos Wars|Battle of Survival screenshot Stratagus is a free and open-source cross-platform game engine used to build real-time strategy video games. Licensed under the GNU GPL-2.0-only, it is written mostly in C++ with the configuration language being Lua.

Zinf is a free audio player for Unix-like and Windows operating systems. Zinf is released under the GNU General Public License.

distributed version control system

program and library designed to interconvert between many file formats used in molecular modeling and computational chemistry

Gnus (), or Gnus Network User Services, is a message reader which is part of GNU Emacs. It supports reading and composing both e-mail and news and can also act as an RSS reader, web processor, and directory browser for both local and remote filesystems.

alt=LabPlot interface with column data and sparklines.|thumb|LabPlot can draw sparklines at top of the data columns to show a quick glance of the data before plotting them. LabPlot is a free and open-source, cross-platform computer program for interactive scientific plotting, curve fitting, nonlinear regression, data processing and data analysis. LabPlot is available, under the GPL-2.0-or-later license, for Windows, macOS, Linux, FreeBSD and Haiku operating systems.

volunteer distributed computing project and screensaver

2019 video game

2001 video game

RKWard is a transparent front-end to the R programming language, a scripting-language with a strong focus on statistics functions. RKWard tries to combine the power of the R language with the ease of use of commercial statistical packages.

ILIAS ( [German for "Integrated Learning, Information and Work Cooperation System"]) is an open-source web-based learning management system (LMS). It supports learning content management (including SCORM 2004 compliance) and tools for collaboration, communication, evaluation and assessment. The software is published under the GNU General Public License and can be run on any server that supports PHP and MySQL.

mdadm is a Linux utility used to manage and monitor software RAID devices. It is used in modern Linux distributions in place of older software RAID utilities such as raidtools2 or raidtools.

FreeIPA is a free and open source identity management system. FreeIPA is the upstream open-source project for Red Hat Identity Management.

Habitica, formerly HabitRPG, is an online task management application developed by HabitRPG, Inc. It was founded on January 30, 2013. The application uses the format of a role-playing game to organize tasks. Habitica is an open source project. It has attracted the interest of scientific research into the efficacy of habit-forming.

BackupPC is a free disk-to-disk backup software suite with a web-based frontend. The cross-platform server will run on any Linux, Solaris, or UNIX-based server. No client is necessary, as the server is itself a client for several protocols that are handled by other services native to the client OS. In 2007, BackupPC was mentioned as one of the three most well known open-source backup software, even though it is one of the tools that are "so amazing, but unfortunately, if no one ever talks about them, many folks never hear of them".

KPackage was KDE's package manager frontend.

partial differential equations which Elmer solves by the Finite Element Method

KRename is a KDE software that can be used for renaming multiple files and directories at one time. Many Linux distributions that use Plasma as the default desktop environment include the KRename software.

Wicd, which stands for Wireless Interface Connection Daemon, is an open-source software utility to manage both wireless and wired networks for Linux. The project started in late 2006 with the creation of Connection Manager, which eventually became Wicd. Wicd aims to provide a simple interface to connect to networks with a wide variety of settings.

free and open-source video editor

OpenBiblio is an open source Integrated Library System. The software is popular with small and rural libraries worldwide due to its simplicity, extensive language support, and good documentation.

OpenNap was an open-source Napster server, extending the Napster protocol to allow sharing of any media type, and adding the ability to link servers together. It became popular after the original Napster network was shut down in 2001, but was subject to similar pressures and its use soon declined. As of 2024, the WinMX client is the only one still in use.

AOKP, short for Android Open Kang Project, is a discontinued open-source replacement distribution for smartphones and tablet computers based on the Android mobile operating system. The name is a play on the word kang (slang for stolen code) and AOSP (Android Open Source Project). The name was a joke, but it stuck. It was started as free and open-source software by Roman Birg based on the official releases of Android Open Source Project by Google, with added original and third-party code, features, and control.

TiMidity++, originally and still frequently informally called TiMidity, is a software synthesizer that can play MIDI files without a hardware synthesizer. It can either render to the sound card in real time, or it can save the result to a file, such as a PCM .wav file.

virtual private network

Rainmeter is a free and open-source desktop customization utility for Windows released under the GNU GPL v2 license. It allows users to create and display user-generated customizable desktop widgets or applets called "skins" that display information. Ready to use collections of skins can be downloaded and installed in packages known as "suites".

Linux distribution

open source social networking software

StealthNet is an anonymous P2P file sharing software based on the original RShare client, and has been enhanced. It was first named 'RShare CE' (RShare Community Edition). It use the same network and protocols as RShare.

free and open-source job scheduler for Linux and similar computers

VuFind is an open-source library search engine that allows users to search and browse beyond the resources of a traditional Online public access catalog (OPAC). Developed by Villanova University, version 1.0 was released in July 2010 after two years in beta.

thumb|Slaptget print screen|250px|right

b2evolution is a content and community management system written in PHP and backed by a MySQL database. It is distributed as free software under the GNU General Public License.

PowerDNS is a software project providing a DNS authoritative server, recursor and proxy. It is written in C++ and licensed under the GPL. It runs on most Unix derivatives. PowerDNS features a large number of different backends ranging from simple BIND style zonefiles to relational databases and load balancing/failover algorithms.

space trading and combat video game

Streamlabs (formerly TwitchAlerts) is a software company headquartered in San Francisco, California. The company was founded in 2014 and distributes a variety of software centered around live streaming and content creation.

Cppcheck is a static code analysis tool for the C and C++ programming languages. It is a versatile tool that can check non-standard code. The creator and lead developer is Daniel Marjamäki.

webtrees is a free open source web-based genealogy application intended for collaborative use.

project aiming to create a 3D desktop, conducted by Sun Microsystems

GeneWeb is a free multi-platform genealogy software tool created and owned by Daniel de Rauglaudre of INRIA. GeneWeb is accessed by a Web browser, either off-line or as a server in a Web environment. It uses very efficient techniques of relationship and consanguinity computing, developed in collaboration with Didier Rémy, research director at INRIA. GeneWeb is used as the engine for several public genealogy websites, including Geneanet, a collection of inter-searchable genealogical databases currently containing references to more than 225 million persons.

file manager

modular desktop environment from System76

K9Copy is a free and open-source DVD backup and DVD authoring program for Unix-like operating systems such as Linux and BSD. It is licensed under the GNU General Public License.

taskbar for the K Desktop Environment

free software

Greenshot is a free and open-source screenshot program for Microsoft Windows. It is developed by Thomas Braun, Jens Klingen and Robin Krom and is published under GNU General Public License, hosted by GitHub. Greenshot is also available for macOS, but as proprietary software through the App Store.

Kaffe is a discontinued "clean room design" (reverse engineering) version of a Java Virtual Machine. It comes with a subset of the Java Platform, Standard Edition (Java SE), Java API, and tools needed to provide a Java runtime environment. Like most other Free Java virtual machines, Kaffe uses GNU Classpath as its class library.

OpenBoard is a free and open-source interactive whiteboard software compatible with any projector and pointing device.

Flowblade Movie Editor is a free and open-source video editing software for Linux.

Potrace () is cross-platform, open-source software which converts bitmapped images into vector graphics. It is written and maintained by Peter Selinger.

qutebrowser (pronounced "cute browser") is a web browser for the operating systems Linux, Windows, and macOS, with vim-style key bindings and a minimal graphical user interface (GUI). It is keyboard-driven and is inspired by similar software such as Vimperator and dwb. It is developed by Freya Bruhin.

music player, tag editor and library organizer