Prey works by installing a small agent on your laptop, it then silently waits for a remote signal to wake up and work. The signal can either be sent from the internet or an SMS message, and allows you to gather information on the device's location, hardware and network status.
Great for helping you find your lost or stolen laptop. You can pin point where the thief is, take a picture and watch there movements on your computer so if they log into Facebook or their email you will even know the thief's name.
Official Site: www.preyproject.com