Synergy is an application that allows you to share a mouse, keyboard, screensaver and clipboard between multiple computers.

If you have more than one computer, each with its own monitor, you can install synergy as a server on one computer and as a client on the others. After a simple configuration you’ll be able to move your mouse to the edge of one monitor and it will enter the monitor of another computer. You can then use your keyboard as well as copy and paste text between the computers. The screensavers for all computers will also activate together. If you have a password set to unlock the screensaver you only need enter the password on one computer to unlock the screen on all of them. Synergy runs on several variants of Unix, Windows 95 through XP and Mac OS X. Best of all, it is distributed under the GNU GENERAL PUBLIC LICENSE and available as a free download.