The following outline is provided as an overview of and topical guide to free software and the free software movement: Free software – software which can be run, studied, examined, modified, and redistributed freely (without any cost). This type of software, which was given its name in 1983, has also come to be known as "open-source software", "software libre", "FOSS", and "FLOSS". The term "Free" refers to it being unfettered, rather than being free of charge. Large free software projects GNU Project Linux Berkeley Software Distribution Free software by type Free and open-source software packages (by type) Comparison of free off-line GPS software Comparison of free software for audio Free statistical software Free television software Free web application software Free software products List of free software project directories List of formerly proprietary software List of Linux distributions List of Ubuntu-based distributions List of open source software packages Comparison of open source wireless drivers List of open source statistical packages List of trademarked open source software List of free and open-source Android applications List of free and open-source software packages List of free software web applications Operating system families Comparison of open-source operating systems AROS BSD Darwin eCos FreeDOS GNU Haiku Inferno Linux Mach MINIX OpenSolaris Plan 9 ReactOS Open-source software development products Basic For Qt Eclipse F# Free Pascal FreeBASIC Gambas GCC Java LLVM Lua NetBeans Open64 Perl PHP Python ROSE Ruby Tcl TypeScript Free software movement Alternative terms for free software Debian Social Contract Free-software licence Gratis versus Libre Open source Open-source definition Open-source software Open-source-software movement Comparison of open source and closed source Comparison of open-source software hosting facilities Open standard Long-term support Software Package Data Exchange Challenges Proprietary software Proprietary device driver ("binary blobs") Free and open-source graphics device driver Proprietary firmware Secure boot Hardware restrictions Digital rights management License proliferation Software patents and free software SCO–Linux controversies Mozilla software rebranded by Debian Open-source software security Trusted Computing Free software licenses Specific licenses Apache Artistic Beerware Boost Software License BSD licenses CC0 GNU General Public License GNU Lesser General Public License ISC license MIT License Mozilla Public License Ms-PL/RL WTFPL zlib License License types and standards Comparison of free and open-source software licenses Contributor License Agreement Copyleft Debian Free Software Guidelines Definition of Free Cultural Works Free license The Free Software Definition The Open Source Definition Open-source license Permissive free software licence Public domain Viral license History