Machinarium - Machinarium is independent puzzle / adventure game by Amanita Design
Clone Hero - Clone Hero is a free rhythm game, which can be played with any 5 or 6 button guitar controller...
timetrap - Simple command line timetracker.
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.
Rescue Lucy - Rescue Lucy is an Adventure, Hidden Object, Puzzle, Point & Click, and Single-player video game developed by Starodymov and published by OtakuMaker.
StepMania - Rhythm game for Windows, Mac, and Linux.