This is really old but is still to much fun. Need a windows version, only issue is most windows processes can not be killed.
http://www.cs.unm.edu/~dlchao/flake/doom/
"Certain processes are vital to the computer's operation and should not be killed. For example, after I took the screenshot of myself being attacked by csh, csh was shot by friendly fire from behind, possibly by tcsh or xv, and my session was abruptly terminated. "