Amethyst started as a port of Infobot to POE, continuing as a generic bot core with the ability to handle multiple connections using different protocols (not necessarily IRC) and soft route the incoming messages through a number of processing centres. One of these processing centres contains much of the original Infobot core.
Atheism is an extremely flexible, configurable and user-friendly multi purpose Perl script for X-Chat. Its main features include auto-away functions with message logging, announcement of songs playing in XMMS on selected channels, a user-friendly interface, detailed documentation, and much more.
CGI:IRC is a Perl/CGI program that allows you to use IRC from a Web browser without having to have access to an IRC port. It does not use Java, but it does need a browser capable of rendering frames. It can be used on a Web page to allow users to chat, or it can be used to access chat from behind a firewall.