Free Software Foundation

The Free Software Foundation (FSF) is a United States 501(c)(3) nonprofit founded by Richard Stallman on October 4, 1985. It supports the free software movement, which argues that users should have the freedom to run, study, modify, and share software. The organization distinguishes “free software” primarily as a matter of user rights rather than price, and commonly promotes copyleft licensing, under which modified versions must preserve comparable freedoms for subsequent users. The FSF emerged from the GNU Project, which Stallman began at the Massachusetts Institute of Technology in 1983 to develop a complete operating system composed of freely redistributable software. During the foundation’s early years, its resources were used substantially to employ programmers, continue GNU development, and distribute manuals and software tapes. Since the GNU system acquired a broader volunteer and institutional base, the FSF has increasingly concentrated on advocacy, licensing, legal infrastructure, education, standards, and community organization. The foundation publishes and maintains key statements and licenses associated with the movement. Its best-known instrument is the GNU General Public License (GPL), a copyleft license used by many software projects. It also publishes the GNU Lesser General Public License, GNU Affero General Public License, and GNU Free Documentation License. As copyright holder for parts of the GNU system, including significant GNU toolchain components, the FSF can participate in enforcing GPL obligations and educating companies and developers about license compliance. Its activities extend beyond licensing. The FSF maintains the Free Software Definition, supports the GNU Project, hosts projects through Savannah, maintains the Free Software Directory and the hardware-compatibility h-node, and operates the Respects Your Freedom certification program for hardware meeting demanding free-software requirements. Its campaigns have addressed digital restrictions management, software patents, proprietary formats, and other technologies or policies it regards as limiting user control. LibrePlanet provides a community and event framework for regional groups, activists, and contributors. The organization has also operated GNU Press, awarded contributors and socially beneficial projects, supported high-priority software projects, and published lists of operating systems that meet its free-software criteria. Funding comes mainly from members, patrons, donations, publications, services, compliance work, job listings, and its web store. The FSF remains active as an advocacy and licensing institution rather than a conventional commercial software company. Its influence is tied to the GNU ecosystem, the GPL family of licenses, and the broader debate over software freedom, privacy, digital rights, and user control.

The Free Software Foundation was incorporated in Boston in 1985 by Richard Stallman to provide organizational support for the GNU Project and the emerging free software movement. Its early work combined software development with distribution: the foundation employed developers, continued GNU projects, and sold manuals and software tapes to help finance the production of a complete free operating system. The institution’s political and ethical position was that software users should control the programs they run, rather than merely receive permission from copyright holders to use them under restrictive conditions. From the late 1980s onward, the FSF became closely associated with copyleft, a licensing approach designed to preserve user freedoms in derivative works. The GNU General Public License became its central legal instrument, while the foundation also published the LGPL, AGPL, and GFDL. The FSF holds copyrights in numerous GNU components and therefore has a role in addressing violations of GPL conditions. For many years, enforcement was handled informally, often by Stallman with legal assistance from Eben Moglen. In the early 2000s, the work was organized through GPL Compliance Labs under executive director Bradley Kuhn, with assistance from Moglen, David Turner, and Peter T. Brown. The period from 2002 to 2004 saw increased attention to GPL enforcement, including matters involving Linksys and OpenTV. The FSF also organized legal seminars explaining the GPL and related copyright law. The foundation was drawn into the wider controversy surrounding SCO’s lawsuit against IBM in 2003 because SCO asserted claims involving free software and GNU-related code. The FSF was subpoenaed but was not itself a litigant, and it devoted considerable advocacy effort to limiting the lawsuit’s effect on confidence in free software. A major licensing milestone arrived in 2007 with publication of GPL version 3. The revision addressed issues including patent arrangements, technological restrictions, and the legal treatment of digital restrictions. The process involved substantial public consultation and reinforced the FSF’s preference for licenses that protect downstream user freedoms. In 2008 the FSF sued Cisco over GPL-licensed components distributed with Linksys products. The dispute concluded in 2009 with a settlement involving a financial donation to the FSF and Cisco’s appointment of a free-software compliance director. Beyond litigation and licensing, the foundation developed a broad program of movement infrastructure. It maintained the Free Software Definition, supported the GNU Project, hosted development through Savannah, and created the Free Software Directory as a catalog of verified free software. The h-node project records hardware and driver compatibility, while the Respects Your Freedom program certifies hardware that meets requirements concerning free software, user modification, and the absence of backdoors. Campaigns such as Defective by Design have opposed digital restrictions management, and other initiatives have addressed software patents, proprietary formats, and high-priority gaps in the free-software ecosystem. The FSF has also supported community organization through LibrePlanet, published educational materials through GNU Press, offered awards, and maintained lists of approved operating systems. Its advocacy has sometimes generated criticism, including disputes over the tone and effectiveness of anti-DRM campaigns and disagreements with Linux developers over GPLv3 and digital restrictions. In 2019 Stallman resigned as president following controversy over remarks related to the Jeffrey Epstein scandal, although he continued leading the GNU Project and returned to the FSF board in 2021. The organization later moved to fully remote operations in 2024. It continues to operate as a nonprofit funded primarily by members, patrons, and donations, with its identity centered on software freedom, copyleft licensing, and user control.

1. 2024Physical Boston office closed

   The organization switched to fully remote operations in August.

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2. 2021Stallman rejoins the board

   Stallman returned to the FSF board, a decision that generated further community criticism.

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3. 2019Stallman resigns as president

   Stallman left the presidency amid public controversy over comments concerning the Epstein scandal.

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4. 2012Respects Your Freedom program launched

   The FSF introduced a hardware certification scheme for products meeting its requirements for user-modifiable free software.

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5. 2009Cisco settlement completed

   The FSF and Cisco resolved the Linksys GPL dispute through a settlement that included funding and an ongoing compliance commitment.

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6. 2007GPL version 3 released

   The foundation published the third version of the GNU General Public License after an extensive public drafting process.

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7. 2001GPL Compliance Labs organized

   The FSF formalized its approach to GPL compliance and enforcement after years of largely informal activity.

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8. 1985Free Software Foundation established

   The FSF was incorporated in Boston on October 4 to support GNU development and promote the free software movement.

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9. 1983GNU Project begins

   Richard Stallman began the GNU Project, the initiative that provided the principal organizational and technical context for the later foundation.

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Nonprofit advocacy, licensing, legal education, and community infrastructure for software freedom.

• GNU General Public LicenseSoftware license1989

  The GPL is the FSF’s best-known copyleft license. It permits users to run, study, modify, and redistribute covered software, while requiring distribution of corresponding source code and preservation of the license freedoms in covered derivative works. GPL version 3, released in 2007, addresses issues including patents and technological restrictions.

• GNU Lesser General Public LicenseSoftware license1991

  The LGPL is designed for certain libraries and permits linking under conditions that can be more permissive than the ordinary GPL. It seeks to preserve users’ ability to modify the library while allowing broader forms of combination with other software.

• GNU Affero General Public LicenseSoftware license2007

  The AGPL extends copyleft obligations to certain software used over a network, requiring users who provide modified versions as network services to offer corresponding source code under the license’s terms.

• GNU Free Documentation LicenseDocumentation license2000

  The GFDL is a copyleft license for manuals and other documentation. It is intended to keep documentation available for copying and modification under conditions that preserve specified freedoms.

• Free Software DirectoryDirectory and verification service1999

  The directory catalogs software packages reviewed against the FSF’s free-software criteria. Entries can include project, developer, language, homepage, and licensing information, giving users a reference for identifying software that respects the movement’s definition.

• SavannahProject hosting2000

  Savannah provides hosting and collaboration infrastructure for selected free software projects. It supports development, source management, and community coordination under an emphasis on software freedom.

• Respects Your FreedomHardware certification2012

  RYF is a certification program for hardware whose software can be freely used, studied, modified, and shared. Certified products must meet requirements concerning user installation of modified software, licensing, and the absence of backdoors or other restrictions.

• GNU PressPublishing

  GNU Press publishes books and educational materials about computer science and free software, with an emphasis on affordable distribution and licensing compatible with the movement’s principles.

• 2012Defective by Design

  Worldwide

  An FSF-initiated campaign opposing digital restrictions management, which the organization describes as technology intended to limit users’ ability to access, copy, modify, or control digital works.

  Outcome. Ongoing advocacy campaign

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• Campaign against software patents

  Worldwide

  The FSF advocates against software patents on the grounds that they can restrict software development and threaten the freedoms of programmers and users.

  Outcome. Ongoing policy advocacy

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• High-priority free software projects

  Worldwide

  The foundation highlights projects where it believes the lack of a free replacement leaves users dependent on proprietary software, including work involving firmware, mobile systems, drivers, and communications tools.

  Outcome. Ongoing project advocacy

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• 2024Move to remote operationsStrategy

  The foundation reassessed its physical-office model after years of distributed and digital community work.

  What changed. The FSF closed its physical Boston headquarters and moved to fully remote operations.

  Aftermath. Boston remained associated with the organization’s location, but day-to-day work became remote.

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• 2019Change presidential leadershipOther

  Public criticism followed Stallman’s comments concerning the Epstein scandal and the role of Marvin Minsky.

  What changed. Stallman resigned as president while continuing to lead the GNU Project.

  Aftermath. The organization faced continuing governance debate, and Stallman later returned to its board in 2021.

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• 2009Settle Cisco GPL litigationOther

  The FSF alleged that Cisco distributed GPL-licensed components in Linksys products without meeting the license obligations, despite earlier notifications.

  What changed. The parties settled, with Cisco agreeing to make a monetary donation and appoint a free-software director responsible for continuing compliance reviews.

  Aftermath. The settlement became a prominent example of the FSF using litigation and negotiated compliance commitments to enforce copyleft obligations.

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• 2007Adopt GPL version 3Generation change

  The earlier GPL version had to be revised to address new legal and technical challenges, including software patents, digital restrictions, and license compatibility.

  What changed. The FSF published GPLv3 after a public consultation and drafting process.

  Aftermath. GPLv3 became the current major GPL version and a central reference point in debates over copyleft, patents, and user control.

  • Linux kernel project — Linus Torvalds and others criticized aspects of GPLv3, particularly its relationship to digital restrictions management.
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• 2021Controversy over Stallman’s return to the boardControversy

  Stallman’s return to the board prompted criticism from members of the free software and open-source communities, including resignations and objections from some former directors.

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• 2019Richard Stallman resignation controversyControversy

  Stallman resigned as FSF president after public criticism of comments he made in connection with Marvin Minsky and Jeffrey Epstein’s sex-trafficking scandal. The episode led to wider debate about governance, leadership, and the culture of the free software movement.

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• 2025Zoë Kooyman became executive director

  Kooyman succeeded John Sullivan as executive director according to the foundation’s published organizational information.

  Leadership change
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• 2024FSF moved to fully remote operations

  The foundation closed its physical Boston office and adopted remote work as its operating model.

  Other
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• 2009FSF reached Cisco GPL settlement

  A lawsuit concerning GPL-licensed components in Linksys products ended with a settlement that included a donation and a continuing compliance role at Cisco.

  Lawsuit
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• 2007GNU General Public License version 3 published

  After a broad consultation process, the FSF released the third major version of the GPL.

  Product generationOther
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• 2003FSF responded to SCO v. IBM litigation

  Although not a party, the foundation was subpoenaed and advocated against what it viewed as harmful effects of SCO’s claims on GNU and free software adoption.

  Lawsuit
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• 2002FSF pursued prominent GPL compliance matters

  Cases involving Linksys and OpenTV made license compliance and copyleft enforcement a prominent part of the foundation’s public work.

  Lawsuit
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• 2001FSF formalized GPL compliance work

  The foundation created GPL Compliance Labs to organize its previously informal enforcement and education activities.

  Other
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• 1985Free Software Foundation founded in Boston

  Richard Stallman established the nonprofit to support GNU development and the free software movement.

  Other
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1. Free Software Foundation
2. Free Software Foundation official website
3. GNU General Public License version 3
4. Respects Your Freedom certification
5. GNU history
6. FSF campaigns
7. Defective by Design
8. High-priority free software projects
9. 佐伊·库伊曼出任执行董事