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While unpacking my office, I dug out my flat panel LCDs, which I was psyched to use again. I hooked one up to my MacBook to use as a secondary screen but still had another panel to use. So I hooked that one up to my old powerbook and fired it up. But it wasn’t very practical to try to use 2 laptops on the same desk. So I installed Synergy on both laptops, and voila, I had 3 screens of space all controlled from my MacBook. Synergy allows you to use a single mouse/keyboard among multiple machines – pretty neat. If you’re using it on a Mac, I would suggest SynergyKM, which wraps the program into a preference pane.
Another neat gem I found while cleaning out some old desktop PCs that are bound for donation is Darik’s Boot and Nuke, which you can use to boot your machine and automatically securely wipe your hard drives, a must if you’re getting rid of a computer.