LotsaWater

LotsaWater is a screensaver that immerses your desktop in a thin layer of water on which waves are generated, showing your screen but through a ripple effect.

Admittedly, the concept of screensavers is not very original, but the quality of LotsaWater makes it worth a look.

You can set various parameters that affect the interference caused by the screensaver: the level of detail, for example, or the accuracy, speed, water depth, frequency of rain, and so on.

It's also possible to choose the brightness of the screen and display a clock (of customizable size) in the upper-right corner.