OOMon is an Internet Relay Chat (IRC) server monitor bot that watches for abusive client behavior and terminates abusive connections in a highly configurable manner. The bot can be used to detect open proxies, flooding, spam, and cloning.
Genethic IRC Server Monitor is a perl bot which has started being written by the administrator of Geneva.CH.EU.Undernet.org in August of 2001. It is monitoring your IRC server, publishing almost all of the stats in a webpage.