Glory Math 1 is an interactive, generative art application for the iPhone and iPod Touch. Starting with a blank slate, touch and shake to create constantly evolving shapes and fields of color. Explore color noise, merging liquids, and spastic color bars, each only briefly maintaining existence. In the end, all devolves into a single color state... Until you begin your exploration again.
Also check out Glory Math 2, which adds sound to a similar idea.