Clone Hero - Clone Hero is a free rhythm game, which can be played with any 5 or 6 button guitar controller...
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.
StepMania - Rhythm game for Windows, Mac, and Linux.
Ask Me Help Desk - Ask Me Help Desk is a question-and-answer site.