LotsaWater: “This screensaver renders a fairly realistic water effect over your desktop, showing it distorted through the wavy surface of the water as raindrops fall on the surface.

It uses quite a bit of CPU power. There are configuration options to vary the accuracy of the simulation to fit the processing power available.”

Thanks to Doug de Stwolinska for finding this one!

The screensaver shows beautifully rendered rolling green hills covered in perfectly-manicured grass. You fly over them as though gliding in a silent helicopter. It’s utterly hypnotic — and very relaxing, especially on a big display.”