http://thehid2qsvjmsjnlk5zjkqdetd7eqphshtem7gd3sixbnu4krejewpqd.onion/wiki/Intrusive_Surveillance
An excellent writeup for Mac OS can be found at engadget. For Linux there is Gspy , SCRAP , and Motion . A HOWTO on building a mini computer dedicated just to video surveillance on Linux is available at MagicITX . For windows, Dorgem has been discontinued, but it allows you to capture video when the camera detects motion.