The PC Detective (Security & Privacy - Covert Surveillance)

monitors your PC or multiple PCs over a Lan logging all activity including websites visited, applications run, all keystrokes, chat conversations, Instant messages and regular screen captures all in complete stealth, so users will not be aware of it presence, enabling you to keep track on what your kids, spouse, employees etc are up to on your PCs. It is designed to be used either on a standalone machine or over a LAN.