Synergy is a cross-platform [Windows/Macintosh/Linux] application that shares a keyboard and mouse between multiple computers. It’s like magic when you see your mouse cursor moves to a screen next to it.
If you are a Creative Professional, you might use a Wacom tablet. When you use Synergy with Wacom tablet, you will run into a problem as soon as your wacome cursor enters to anther screen.
I might just have a solution for you!