New Project: Graymer (Ultima Underworld Screensaver!)
Graymer is a curiously-named utility designed to do one thing: display the various levels from Ultima Underworld as a screensaver for Windows.
It requires a copy of the game (e.g. from GOG) in order to work, obviously, but can be quickly installed and set up. Grab a copy from the project entry that has just been set up and let your computer spend its dormant moments in the depths of the Stygian Abyss!