Free Software Foundation

On October 4, 2025, the Free Software Foundation reached its 40th anniversary. While no future event descriptions are included here, this date marks four decades of FSF’s steadfast promotion of user freedoms, legal advocacy, licensing stewardship, and community engagement since its founding in 1985.

On October 4, 2020, the Free Software Foundation celebrated its 35th anniversary with a full week of online activities, including the launch of new artwork and videos, a livestreamed gala, and global participation despite the COVID‑19 pandemic. This milestone highlighted FSF’s sustained influence and adaptability in promoting software freedom across decades.

On October 3, 2015, the Free Software Foundation marked its 30th anniversary with the “FSF30” events, held in Boston and Cambridge, Massachusetts. The celebrations included the User Freedom Summit, a birthday party, community events globally, talks (including by Eben Moglen), and the release of commemorative media reflecting on the Foundation’s three decades of advocacy.

On January 27, 2012, the FSF launched the “Respects Your Freedom” (RYF) hardware certification program. This initiative certifies hardware that uses exclusively free software, allows user modifications, is free of backdoors, and meets strict freedom standards. RYF represents FSF’s expansion from software licensing into hardware advocacy for user autonomy.

In December 2008, the Free Software Foundation filed a lawsuit against Cisco, alleging repeated GPL violations related to the use of GNU-licensed components in Linksys products. The legal action underscored FSF’s commitment to defending copyleft principles. By May 2009, the case was settled: Cisco agreed to a monetary donation to FSF and to appoint a Free Software Director to oversee license compliance.

On November 25, 2002, under Executive Director Bradley M. Kuhn, the Free Software Foundation launched its Associate Membership program to enable individuals to formally support and participate in its governance. Bradley Kuhn became the first Associate Member, and the program introduced a structured community membership role that has since expanded to include board nominations and direct engagement at annual meetings.

In December 1992 (informally) and formalized in December 2001, FSF began building its Licensing and Compliance Lab to manage GPL enforcement, copyright assignments, and legal education. This entity formalized the foundation’s ability to uphold licensing terms, engage in compliance work, and educate developers and legal professionals about copyleft obligations.

In 1991, the Free Software Foundation officially published version 2 of the GNU General Public License (GPLv2), a landmark copyleft license that ensured software remained free through all derivative works. GPLv2 enabled developers and distributors to legally share and modify code while preserving user freedoms—a foundational tool adopted widely in the free software and open-source ecosystem.

In February 1986, the Free Software Foundation published the initial Free Software Definition in the first issue of its GNU’s Bulletin. This policy document articulated the criteria for free software, enumerating the vital “four freedoms” (later numbered 0 through 3). This definition became the philosophical bedrock for FSF's advocacy and licensing efforts, distinguishing free software from proprietary alternatives.

On October 4, 1985, the Free Software Foundation (FSF) was officially incorporated in Boston, Massachusetts by Richard Stallman along with founding members such as Harold Abelson, Robert J. Chassell, Gerald Jay Sussman, and Leonard H. Tower Jr. The foundation was established to support the GNU Project and to promote the principles of software freedom globally through legal, technical, and educational efforts.

On September 27, 1983, Richard M. Stallman publicly declared the launch of the GNU Project, a pioneering initiative to create a fully free operating system. This announcement laid the philosophical and technical foundation for what would become the free software movement and eventually led to the formation of the Free Software Foundation. The GNU Project’s conception signified a crucial turning point, emphasizing users’ freedom to run, study, modify, and share software—not just its utility.