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Thanks to your support, 2015 marks 30 years of the FSF! In the next 30 years, we want to do even more to defend computer user rights. To kick off in that direction, we're setting our highest-ever fundraising goal of $525,000 by January 31st. Read more.

$525K
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GNU is the only operating system developed specifically to give its users freedom. What is GNU, and what freedom is at stake?

What is GNU?

GNU is an operating system that is free software—that is, it respects users' freedom. The development of GNU made it possible to use a computer without software that would trample your freedom.

We recommend installable versions of GNU (more precisely, GNU/Linux distributions) which are entirely free software. More about GNU below.

Screenshot of GNU

What is the Free Software Movement?

The free software movement campaigns to win for the users of computing the freedom that comes from free software. Free software puts its users in control of their own computing. Non-free software puts its users under the power of the software's developer. See the video explanation.

What is Free Software?

Free software means the users have the freedom to run, copy, distribute, study, change and improve the software.

Free software is a matter of liberty, not price. To understand the concept, you should think of “free” as in “free speech”, not as in “free beer”.

More precisely, free software means users of a program have the four essential freedoms:

  • The freedom to run the program as you wish, for any purpose (freedom 0).
  • The freedom to study how the program works, and adapt it to your needs (freedom 1). Access to the source code is a precondition for this.
  • The freedom to redistribute copies so you can help your neighbor (freedom 2).
  • The freedom to improve the program, and release your improvements to the public, so that the whole community benefits (freedom 3). Access to the source code is a precondition for this.

Developments in technology and network use have made these freedoms even more important now than they were in 1983.

Nowadays the free software movement goes far beyond developing the GNU system. See the Free Software Foundation's web site for more about what we do, and a list of ways you can help.

More about GNU

GNU is a Unix-like operating system. That means it is a collection of many programs: applications, libraries, developer tools, even games. The development of GNU, started in January 1984, is known as the GNU Project. Many of the programs in GNU are released under the auspices of the GNU Project; those we call GNU packages.

The name “GNU” is a recursive acronym for “GNU's Not Unix.” “GNU” is pronounced g'noo, as one syllable, like saying “grew” but replacing the r with n.

The program in a Unix-like system that allocates machine resources and talk to the hardware is called the “kernel”. GNU is typically used with a kernel called Linux. This combination is the GNU/Linux operating system. GNU/Linux is used by millions, though many call it “Linux” by mistake.

GNU's own kernel, The Hurd, was started in 1990 (before Linux was started). Volunteers continue developing the Hurd because it is an interesting technical project.

More information.

Download GNU now

Planet GNU RSS Feed

IceCat 31.4.0 release: GNUzilla is the GNU version of the Mozilla suite, and GNU IceCat is the GNU version of the Firefox browser. Its main advantage is an ethical one: it is entirely free sof... more

Friday Free Software Directory IRC meetup: January 30: Join the FSF and friends on Friday, January 30, from 2pm to 5pm EST (19:00 to 22:00 UTC) to help improve the Free Software Directory by a... more

GNU Guix at FOSDEM: Guix will be present at FOSDEM in Brussels, Belgium, with a talk entitled "The Emacs of Distros" this Saturday, at 3PM, in room H.1302. The talk will give an update on deve... more

For more news, see Planet GNU and the list of recent GNU releases.

GNUbik

GNUbik is a puzzle game in which you must manipulate a cube to make each of its faces have a uniform color. The game is customizable, allowing you to set the size of the cube (the default is 3x3) or to change the colors. You may even apply photos to the faces instead of colors. The game is scriptable with Guile. (doc)

Short descriptions for all GNU packages.

Take Action

Can you contribute to any of these High Priority Projects? Gnash, coreboot, free distributions of GNU/Linux, GNU Octave, drivers for network routers, reversible debugging in GDB, automatic transcription, PowerVR drivers, and also free software replacements for Skype, OpenDWG libraries, and Oracle Forms.

Can you take over an unmaintained GNU package? gleem, gnukart, halifax, jwhois, metahtml, orgadoc, polyxmass, superopt, teximpatient, are all looking for maintainers. Also, these packages are looking for co-maintainers: aspell, gnuae, metaexchange, powerguru. See the package web pages for more information.

 [FSF logo] “Our mission is to preserve, protect and promote the freedom to use, study, copy, modify, and redistribute computer software, and to defend the rights of Free Software users.”

The Free Software Foundation is the principal organizational sponsor of the GNU Operating System. Support GNU and the FSF by buying manuals and gear, joining the FSF as an associate member, or making a donation, either directly to the FSF or via Flattr.

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The FSF also has sister organizations in Europe, Latin America and India.