ZoneMinder - ZoneMinder is a free and open-source piece of security software that can be used at home or in your business. The software puts you in control of all of your data, and it is exceptionally easy to setup. Read more about ZoneMinder.
Clone Hero - Clone Hero is a free rhythm game, which can be played with any 5 or 6 button guitar controller...
iSpy - iSpy is software that allows the user to view and control video surveillance cameras. The software began development in 2007 and now has over 2 million users around the world, according to the software's website. Read more about iSpy.
StepMania - Rhythm game for Windows, Mac, and Linux.
MotionEye - motionEye is a web frontend for the motion daemon, written in Python.
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.