Fenêtres Volantes 1.0:

Screensaver for Mac OS X that takes your open windows and sends them spinning and flying about your screen, like weightless objects in outer space; they snap back into place when you dismiss the saver. Freeware. (Thanks to Ian Roberts.)

This is lovely to look at, though sometimes there is way way way too many windows with source code flying around, make me wonder, ooo when was the last time I saved… checked in my source…. backed up…

(Via Daring Fireball.)