Turus and I were talking about "what happened to that old Doom game where..." and... well, it's still alive!
http://www.cs.unm.edu/~dlchao/flake/doom/after.html
It's essentially an interface to ps and a couple of other utilities. In it, processes on your system are represented by monsters in Doom(r) and if you kill them, it will send a SIGKILL (yes, that's kill -9) to that process and the process will die off. Be careful, though, it's also possible to kill important processes that you're working on!
Here's the project SourceForge page:
http://psdoom.sourceforge.net/