GRAMPS is a Free Software Project for Genealogy, offering a professional genealogy program, and a wiki open to all. (GPL)
Linux - FreeBSD - Windows - MAC OS X
SportsTracker is an application for people which want to record their sporting activities. (GPL)
Cross-platform
Workrave is a program that assists in the recovery and prevention of Repetitive Strain Injury (RSI). (GPL)
Linux - Windows
3 applications