Synergy - Mouse/Keyboard Sharing Utility for Across Different OS's

Synergy

"Synergy lets you easily share a single mouse and keyboard between multiple computers with different operating systems, each with its own display, without special hardware. It's intended for users with multiple computers on their desk since each system uses its own monitor(s).

Redirecting the mouse and keyboard is as simple as moving the mouse off the edge of your screen. Synergy also merges the clipboards of all the systems into one, allowing cut-and-paste between systems. Furthermore, it synchronizes screen savers so they all start and stop together and, if screen locking is enabled, only one screen requires a password to unlock them all. Learn more about how it works.

Synergy is open source and released under the GNU Public License (GPL). 

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Now doesn't that just sound cool?

What's also very cool is that it runs on Windows, Mac OS X 10.2+ and Linux/X Windows. So you can move your mouse off your Windows screen and onto your Linux box...

(via philweber.net - Cool Utility )