Free Software Foundation (FSF)

The Free Software Foundation (FSF) is a nonprofit organization founded by Richard Stallman to promote computer user freedom and defend the rights of all free software users. It sponsors the GNU Project — the foundational free software operating system — and stewards widely used open-source licenses including the GPL, LGPL, and AGPL. The FSF is the organizational backer of GNU Emacs, a powerful, extensible text editor that predates and philosophically contrasts with corporate-backed editors like VS Code and Cursor.