Summer of Code
Science and Medicine
End User Applications
Programming Languages and Development Tools
Graphics / Video / Audio / Virtual Reality
Social / Communications
Data and Databases
Making Home Networking and Storage Simple
Fedora Linux is built on the foundations of Freedom, Friends, Features, & First
FreeBSD: The Foundation of the Internet
A flexible, source-based Linux distribution.
Light open-source operating system that specifically targets personal computing.
Open Source successor of OpenSolaris
Confederation of microkernel projects (Genode, HelenOS, GNU Hurd, MINIX, Redox)
FOSS community-driven project that provides firewalling tools for Linux
The makers' choice for sysadmins, developers and desktop users.
System-level performance analysis toolkit
A reasonably secure operating system
ReactOS is a free, open source, Windows compatible operating system.
RTEMS is a real-time operating system used around the world and in space.
linux syscall tracer
The GNU Project
GNU is an operating system that is free software
The Linux Foundation
A non-profit consortium dedicated to fostering the growth of Linux
The NetBSD Foundation
Of course it runs NetBSD!
Search for projects, organizations or usernames