Software using the GNU General Public License

PlayOnLinux is a graphical frontend for the Wine software compatibility layer which allows Linux users to install Windows-based video games, Microsoft Office (2000 to 2016), Microsoft Internet Explorer, as well as many other applications such as Apple iTunes and Safari.

MoinMoin is a wiki engine implemented in Python, initially based on the PikiPiki wiki engine. Its name is a play on the North German greeting Moin, repeated as in WikiWiki. The MoinMoin code is licensed under the GNU General Public License v2, or (at the user's option) any later version (except some 3rd party modules that are licensed under other Free Software licenses compatible with the GPL).

JuK is a free software audio player by KDE, the default player since K Desktop Environment 3.2. JuK supports collections of MP3, Ogg Vorbis, and FLAC audio files.

InfraRecorder is an open-source CD and DVD writing program for Microsoft Windows. First started by Christian Kindahl in the Google Summer of Code 2006, InfraRecorder uses the cdrtools software library to perform the actual burning.

thumb|250px|Krusader on Debian Sarge with the Gnome desktop environment thumb|250px|Krusader-1.60.0 / KDE 3.41 on Apple Mac OS X

Rosegarden is a free software digital audio workstation program developed for Linux with ALSA, JACK and Qt4. It acts as an audio and MIDI sequencer, scorewriter, and musical composition and editing tool. It is intended to be a free alternative to such applications as Cubase.

2013 video game

Nintendo Switch emulation software

Mullvad is a commercial VPN service based in Sweden. The name "Mullvad" is the word for "mole" in the Swedish language. Mullvad operates using the WireGuard protocol. It also supports Shadowsocks as a bridge protocol for censorship circumvention. Mullvad's VPN client software is publicly available under the GPLv3, a free and open-source software license.

TestDisk is a free and open-source data recovery utility that helps users recover lost partitions or repair corrupted filesystems. TestDisk can collect detailed information about a corrupted drive, which can then be sent to a technician for further analysis. TestDisk supports DOS, Microsoft Windows (i.e. NT 4.0, 2000, XP, Server 2003, Server 2008, Vista, Windows 7, Windows 8.1, Windows 10), Linux, FreeBSD, NetBSD, OpenBSD, SunOS, and MacOS. TestDisk handles non-partitioned and partitioned media. In particular, it recognizes the GUID Partition Table (GPT), Apple partition map, PC/Intel BIOS par

mailing list manager

GTK-based Email client

Squashfs is a compressed read-only file system for Linux. Squashfs compresses files, inodes and directories, and supports block sizes from 4 KiB up to 1 MiB for greater compression. Several compression algorithms are supported. Squashfs is also the name of free software, licensed under the GPL, for accessing Squashfs filesystems.

ratpoison is a tiling window manager for the X Window System primarily developed by Shawn Betts. The user interface and much of their functionality are inspired by the GNU Screen terminal multiplexer. While ratpoison is written in C, Betts' StumpWM re-implements a similar window manager in Common Lisp.

Omeka (also known as Omeka Classic) is a free, open-source content management system for online digital collections. As a web application, it allows users to publish and exhibit cultural heritage objects, and extend its functionality with themes and plugins. A lightweight solution in comparison to traditional institutional repository software like DSpace and Fedora, Omeka has a focus on display and uses an unqualified Dublin Core metadata standard.

network software emulator

RawTherapee is a free and open source application for processing photographs in raw image formats such as those created by many digital cameras. It comprises a subset of image editing operations specifically aimed at non-destructive post-production of raw photos and is primarily focused on improving a photographer's workflow by facilitating the handling of large numbers of images. It is notable for the advanced control it gives the user over the demosaicing and developing process. It is cross-platform, with versions for Microsoft Windows, macOS and Linux.

malware that turns computer systems running Linux into remotely controlled "bots"

web browser

WeeChat (Wee Enhanced Environment for Chat) is a free and open-source Internet Relay Chat client that is designed to be light and fast. It is released under the terms of the GNU GPL-3.0-or-later and has been developed since 2003.

System monitor for X

CodeLite is a free and open-source IDE for the C, C++, PHP, and JavaScript (Node.js) programming languages.

user-friendly interactive Unix shell

HotSpot, released as Java HotSpot Performance Engine, is a Java virtual machine for desktop and server computers, developed by Sun Microsystems which was purchased by and became a division of Oracle Corporation in 2010. Its features include improved performance via methods such as just-in-time compilation and adaptive optimization. It is the de facto reference Java Virtual Machine.

2002 video game

gThumb is a free and open-source image viewer and image organizer with options to edit images. It is designed to have a clean and simple user interface and follows the GNOME Human Interface Guidelines and integrates well with the GNOME desktop environment.

Fritzing is an open-source initiative to develop amateur or hobby CAD software for the design of electronics hardware, intended to allow designers and artists to build more permanent circuits from prototypes. It was developed at the University of Applied Sciences Potsdam. Fritzing is free software under the GPL 3.0 or later license, with the source code available on GitHub and the binaries at a monetary cost, which is allowed by the GPL.

discrete event network simulator

NetSurf is an open-source web browser which uses its own layout engine. Its design goal is to be lightweight and portable. NetSurf provides features including tabbed browsing, bookmarks, and page thumbnailing.

Project64 is a free and open-source Nintendo 64 emulator written in the programming languages C and C++ for Microsoft Windows. This software uses a plug-in system allowing third-party groups to use their own plug-ins to implement specific components. Project64 can play Nintendo 64 games on a computer reading ROM images, either dumped from the read-only memory of a Nintendo 64 ROM cartridge or created directly on the computer as homebrew.

free and open-source chess engine

X11 & Wayland display manager

programming language

QT development environment

Open source database application

project to port and package open-source Unix software to macOS

ZSNES is an emulator for the Super Nintendo Entertainment System released as free software. There are official ports for Linux, MS-DOS, Windows, and unofficial ports for Xbox, and macOS.

rdesktop is an implementation of a client software for Microsoft's proprietary Remote Desktop Protocol (RDP). Rdesktop is free and open-source software, subject to the requirements of the GNU General Public License (GPL-3.0-or-later), and is available for Linux and BSD as well as for Microsoft Windows.

server-side application for playing music

free software; default installer for Ubuntu and its derivatives

Desktop Environment for Linux

AsciiDoc is a human-readable document format, semantically equivalent to DocBook XML, but using plain text mark-up conventions. AsciiDoc documents can be created using any text editor and read “as-is”, or rendered to HTML or any other format supported by a DocBook tool-chain, i.e., PDF, TeX, Unix manpages, e-books, slide presentations, etc. Common file extensions for AsciiDoc files are adoc and historically txt (as encouraged by AsciiDoc's creator).

free and open source vehicle-simulation game

Liferea (short for Linux Feed Reader) is a news aggregator for online news feeds and podcasts. It supports the major feed formats including RSS/RDF and Atom and can import and export subscription lists in OPML format. Liferea is intended to be a fast, easy to use, and easy to install news aggregator for GTK+ that can be used with the GNOME desktop. Liferea features a script manager, in which users can add custom scripts that run whenever a certain action occurs.

free software

component-based data mining and machine learning software suite

TinyMCE is an online rich-text editor released as open-source software under the GNU General Public License version 2 or later. TinyMCE uses a freemium business model that includes a free core editor and paid plans with advanced features. It converts HTML textarea fields, or other designated HTML elements, into editor instances.

SPIP (''Système de Publication pour l'Internet'') is a free software content management system designed for web site publishing, oriented towards online collaborative editing.

ZYpp (or libzypp; "Zen / YaST Packages Patches Patterns Products") is a package manager engine that powers Linux applications like Myrlyn, YaST, Zypper and the implementation of PackageKit for openSUSE and SUSE Linux Enterprise. Unlike some more basic package managers, it provides a satisfiability solver to compute package dependencies. It is a free and open-source software project sponsored by SUSE and licensed under the terms of the GNU General Public License v2 or later. ZYpp is implemented mostly in the programming language C++.

browser extension for making web browsers use HTTPS instead of HTTP when possible

MLDonkey is an open-source, multi-protocol, peer-to-peer file sharing application that runs as a back-end server application on many platforms. It can be controlled through a user interface provided by one of many separate front-ends, including a Web interface, telnet interface and over a dozen native client programs.

Mednafen (My Emulator Doesn't Need A Frickin' Excellent Name), formerly known as Nintencer, is an OpenGL and SDL multi-system free software wrapper that bundles various original and third-party emulation cores into a single package, and is driven by command-line input. It is distributed under the terms of the GPL-2.0-or-later license. Certain emulation cores of Mednafen have been ported to RetroArch/Libretro.

daemon application designed to take care of the user's security credentials

PearPC is a PowerPC platform emulator capable of running many PowerPC operating systems, including pre-Intel versions of Mac OS X, Darwin, and Linux on x86 hardware. It is released under the GNU General Public License (GPL). It can be used on Windows, Linux, FreeBSD and other systems based on POSIX-X11. The first official release was made on May 10, 2004. The software was often used to run early versions of OS X on Windows XP computers.

x265 is an encoder for creating digital video streams in the High Efficiency Video Coding (HEVC/H.265) video compression format developed by the Joint Collaborative Team on Video Coding (JCT-VC). It is available as a command-line app or a software library, under the terms of GNU General Public License (GPL) version 2 or later; however, customers may request a commercial license.

KVIrc is a graphical IRC client for Linux, Unix, Mac OS and Windows. The name is an acronym of K Visual IRC in which the K stands for a dependency to KDE, which became optional from version 2.0.0. The software is based on the Qt framework and its code is released under a modified GNU General Public License.

XEmacs is a graphical- and console-based text editor which runs on almost any Unix-like operating system as well as Microsoft Windows. XEmacs is a fork, based on a version of GNU Emacs from the late 1980s. Any user can download, use, and modify XEmacs as free software available under the GNU General Public License version 2 or any later version.

Weblate is an open source web-based translation tool with version control. It includes several hundred languages with basic definitions, and enables the addition of more language definitions, all definitions can be edited by the web community or a defined set of people, as well as through integrating machine translation, such as DeepL Translator, Amazon Translate, or Google Translate.

KNIME (), the Konstanz Information Miner, is a data analytics, reporting and integrating platform. KNIME integrates various components for machine learning and data mining through its modular data pipelining "Building Blocks of Analytics" concept. A graphical user interface and use of Java Database Connectivity (JDBC) allows assembly of nodes blending different data sources, including preprocessing (extract, transform, load (ETL)), for modeling, data analysis and visualization with minimal, or no, programming. It is free and open-source software released under a GNU General Public License.

Privoxy is a free non-caching web proxy with filtering capabilities for enhancing privacy, manipulating cookies and modifying web page data and HTTP headers before the page is rendered by the browser. Privoxy is a "privacy enhancing proxy", filtering web pages and removing advertisements. Privoxy can be customized by users, for both stand-alone systems and multi-user networks. Privoxy can be chained to other proxies and is frequently used in combination with Squid among others and can be used to bypass Internet censorship.