Touch Pianist

Touch Pianist is a web toy that let’s you play famous piano pieces on your computer keyboard. No musical skill needed! The notes are there in visual form; all you have to do is hit any keys to make them play. It’s a little like Guitar Hero, except the controls don’t matter, you set the tempo, and you can’t “lose.” The only skill you need is to keep the tempo going in a way that makes it sound pleasant to you. The default screen is "Moonlight Sonata," but you can pull down other choices. -via b3ta