You may have seen the Bumptop desktop interface previously, but for those not familiar, this "software allows you to bump and toss weighted objects across the desktop and organize them into folders or piles the way you would on your real-world desk." Video after the break.
Bumptop has been around as a video concept for a few years. Now this amazing desktop organizer with a physics engine underpinning the UI is available for download (PC only).[via Engadget]