We have shared basic laptop theft tracking utilities earlier but multi-platform laptop tracking utility PREY is much more powerful and feature rich, the free software for Windows, Linux and Mac allows laptop owners to retrieve general status of the computer, list of running programs, active connections, detailed network/WiFi information, screenshot of desktop and even picture of thief (if a webcam is connected) by email if the laptop is determined stolen by periodic checking of an URL on internet.
Laptop owners needs to configure and activate PREY once and it will run in background periodically checking internet for pre-configured URL without getting noticed, if URL is found it will send e-mail with all tracking information attached.