Anyone who used Ubuntu will instantly know what I'm talking about. Linux has a great feature of multiple Workspaces that too with Cool Cube Effect ! Now you can have the same on your Windows Xp/Vista based PC !
That Software is Yod'm 3D.
Description : Yod'm 3D is a virtual desktop manager conceived for Windows XP and Windows Vista. Like Beryl, on Linux, it is the rotation of a 3D cube which allows you to change your desktop.
How does it work ?
1 - Download Yod'm 3D
2 - Decompress the file in a folder of your choice
3 - Run the program (the first execution can be long)
4 - Push the keys Ctrl+Shift and change your desktop by displacing the cube with your mouse, or by using your left and right keys.
Finally, you should know that the effects 3D of this kind require a rather efficient computer.
Get it from (Free Version) : http://www.crystalxp.net/galerie/en.id.1250-yodm-3d-christians_-explorer-tools.htm
There's a newer Paid Version which is available as a 14 Day Trial : http://yodm-3d.en.softonic.com/
There's another software called Shock 4Way 3D which you can get from here : http://update.docs.kr/entry/Shock-4Way3D-v093-en