Polymorph Website - Freeware
reviewed by ClifNotes
Here is a safe and free screen saver. It's also very entertaining to watch. Polymorf is a small download and includes an installer. It also has a multitude of settings that will let you tweak it to make it look exactly how you want it to look.
The Polymorf3D screen saver displays a shiny colourful 3d shape that morphs and transforms itself over the screen, with an array of rainbow colours in the background.