CAUTION: Very addictive!
Tiltoria is a mesmerising animated light show, music visualizer and psychedelic paint box all rolled into one. There is nothing quite like it.
See it in action at: http://www.youtube.com/watch?v=WAcrVgZ31p8
"It's like an animated Spirograph."
"It's the closest thing to drugs there is!"
"I have dozens of similar apps, but this one is freakin' amazing."