BumpTop is a fun, intuitive 3D desktop that keeps you organized and makes you more productive. BumpTop is currently available for all 32-bit or 64-bit versions of Windows XP, Windows Vista or Windows 7, with latest service packs.
BumpTop uses OpenGL for 3D visualisation, GLEW for OpenGL extensions management, DevIL for image manipulation, Qt for window management and skinning, and NVIDIA PhysX for some effects (adding some interactivity to icons like collisions).
You can grab you free copy here: BumpTop download – 12.2Mb.
But don’t play too much with BumpTop, because it will show you this nice dialog box: