The newest way to steal cycles from your idle processor, smoosh is the first-ever replacement for the Windows desktop.
This is BETA software - meaning it has no known bugs but has not been thoroughly field tested... and it will probably always be in beta as I cannot stop fiddling with it. Also note that this is a 32-bit program and will only run on Windows 95 or Windows NT. With that in mind, enjoy!
(It's also a pretty nifty screensaver, but why
wait around for that neat screensaver when you can have it
as your desktop, all the time? And really, you should turn off
your monitor when you are not using your computer. Beware