Original X11 screensaver was by Massimino Pascal. I "only" ported it to Mac OS X, using OpenGL. pretty close to the original. neat, simple, yet mesmerizing. Someone think that it can dance at the rythm of the music, but it's only a rumor.
Operating System Mac OS X 10.0 Macintosh Mac OS X 10.2 Mac OS X 10.1