Synergy is a software that lets you share a single mouse and keyboard between multiple computers without any special hardware requirement.
Synergy works with different operating systems allowing you to work with the same keyboard and mouse on Windows (95/98/ME/NT/XP), Unix, Mac OS X. I made a diagram below to give you an idea of how synergy works:
To move the keyboard/mouse from one computer to another is easy. Just move your mouse to the egde of your screen. You can also cut and paste between computers now.
Installation is very easy, just install the software on every computers, and then assign the computer with the keyboard/mouse you wish to share as the server.
This is a good software for people who work with multiple computers and monitors but wish to share the same keyboard. Another great news about this software is, it is an open source software released under the GNU Public License (GPL).
To Download and learn more : Download