Recently, I've been sticking the laptop on the table here next to the main PC. Then I can run mIRC and other messaging stuff or watch DVDs and stuff without impacting on what I was doing on the big PC (which is commonly that system hog known as Battlefield 2 these days). But what started to bug was, say, seeing a link I wanted to announce to all my homies on IRC on the main PC, or vice versa. I remembered something about a program that let you share all your local screens and I done a quick search and found Synergy:

“With synergy, all the computers on your desktop form a single virtual screen. You use the mouse and keyboard of only one of the computers while you use all of the monitors on all of the computers. You tell synergy how many screens you have and their positions relative to one another. Synergy then detects when the mouse moves off the edge of a screen and jumps it instantly to the neighboring screen. The keyboard works normally on each screen; input goes to whichever screen has the cursor.”

About Synergy

There's a guide to setting it up at Endgadget.

(Works with Macs too beans)