Particlescape - Particlescape app lets you create stunning patterns at your fingertips.
Padbury Clock Screensaver - Minimal screensaver for Mac
TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
XScreenSaver - XScreenSaver is the standard screen saver collection shipped on most Linux and Unix systems running...
Heat Pad - Heat Pad – Relaxing Heat Sensitive Surface is a beautiful app that simulates multiple heat-sensitive surfaces reacting to the heat of your fingertips.
Really Slick Screensavers - Really Slick contains free 3D OpenGL screensavers.