Copy and paste: Announcing CSCop 1.0, from the co-creator of the highly acclaimed Quake front-end QuakeOn. CSCop is a server utility for Counter-Strike that monitors friendly-fire. If a team-killer decides to have some fun, CSCop instantly takes action kicking or banning them automatically. Here's the blurb from the readme:
Download it at the CSCop Homepage.CSCop is a tool for monitoring Counter-Strike servers, and making sure people play fair. It is primarily for servers that have friendly-fire on, and want to stop Team Killers. CSCop will automatically kick/ban TK'rs. It is also possible to extend CSCop with custom code to add other features. CSCop DOES NOT prevent cheating. It simply monitors log messages, and can take actions based on those messages. Oh yeah, IT'S
FREE!!!