Control multi computers with single keyboard and mouse

I just discovered that there is a program called synergy. With this program, you are able to control multi computers with single keyboard and mouse. How it achieves this is by making a server and many clients. The server's mouse and keyboard is the control one, and other clients will receive signals from the server to do the proper task. What you need to do is simply move your mouse out of the boundary of your display, thus it will enter another one. This program is really cool. More information can be found on the website http://synergy2.sourceforge.net