FSF40 Hackathon

The FSF has been campaigning for software freedom for over forty years, and in honor of our fortieth anniversary, we're inviting the wider free software community to participate in a global, online hackathon to help improve important libre software projects.

It's at the core of the FSF's mission to foster free software development and the FSF40 hackathon is only one of many ways how the FSF supports and promotes free software projects.

The FSF40 hackathon will be held November 21-23, 2025, and is open to everyone, regardless of programming skill level, focusing on making small but measurable improvements to free software.