Merge all of your computers to one keyboard and mouse

Using Synergy you can connect several computers to the same mouse and keyboard. You can easily position the screens relative to one another and the mouse cursor will seamlessly switch between monitors and computers. The keyboard and clipboard are also shared between computers. Screen savers and their password protection are controlled simultaneously as well. A great little free application which is very useful if you have both a desktop and a laptop.

Here is a link to a tutorial to get it up and running with no sweat.