Mind-boggling Synergy

The other day, I found a mind-bogglingly cool tool. Synergy/QuickSynergy shares control of multiple computers with just one keyboard and mouse via TCP/IP. No matter Unix, Windows, or Mac OS X... one mouse to rule them all. Now one sweep with one mouse can cross screens from my Linux desktop over to my MacBook and then on to a second screen attached to it.

Extremely cool when that sweep transfers control between Linux, Mac OS X, a Windows running in a virtual machine on the MacBook, and another Windows Terminal Server remote session, seamlessly attaching the wireless keyboard to each one in turn, and synchronizing the copy&paste buffers along the way.