The two-fold desktop
Metisse is a window manager developped by the In Situ project. Available under the GPL Licence and in exclusivity for Mandriva Linux, Metisse differs from a classic 3D desktop ("the cube") in the way that it offers innovative windows interactions, thus enforcing work efficiency. The copy-paste feature is the most easy and amazing example of Metisse full power.

You thought you knew what 3D was...
Virtual desktops changed it all. More applications, more possibilities and yet, one single screen, not even a 22" one to handle all our actions and thoughts on a computer. Organization is a tricky thing. Like a painter would take a few steps back to see the big picture, zoom out !

Increase Depth Perception
Metisse is not only visually impressive. It also allows us to imagine news ways of interaction with machines. "Metisse allows anyone to discover, right now, what will be the next steps in Linux Desktop evolution. And that's exciting!" says Frédéric Crozat, Senior GNOME Developer at Mandriva. Mouse-clicking has never been that interesting.
http://img139.imageshack.us/img139/8209/ooffenlargewq6.jpg
videos and more stuff here
Metisse - Mandriva Linux
best part about this is metisse works from live cd as well
get the live cd here
Metisse / OtherDownloads / Download / Home - Mandriva Linux