An indie game that could double as a screen saver turned up recently on the Internet.
The game is called Polynomial, and it was made by a Russian guy named Dmytry Lavrov. The concept of Polynomial isn't that special -- you basically fly around in space ship, first person perspective, shooting stuff up. What is exceptional is the execution of this simple concept.
Mr. Lavrov used randomization and fractal generation to generate the
landscape space-scape for the game. Each cool looking fields of light you fly around in represents some variety of math equation.
You can get in dogfights with nasty alien shapes, just fly around, or use the included editor to make up your own space-arenas.
A demo version of the game is available for PC, Macs and Linux OS'es. The demo version if fully featured -- it only lacks the ability to save. You can get it here.