J-Alice is a C++ implementation of an Alicebot clone. It can chat on console, irc and function as a mini-http server. Currently it runs on Linux, BeOS, Windows and Solaris with equal functionality.
Lightweight, modern, flexible and well-customisable cross-platform multi-protocol instant messaging client
A light weight open source IRC client made using Adobe AIR and AJAX. Still in alpha stage. DCC and IRCext not yet supported.
Hircules is an IRC client written in Haskell, with a gtk2 GUI. It uses the gtk2 Haskell binding gtk2hs and the IRC library is based on lambdabot.
Temple is an SQL-backed IRC infobot written for the EFnet #C++ channel, but designed to be usable elsewhere.
Simple IRC robot written in C. It's main function is to hold admin rights.
Modern IRC bot with a ton of features that doesn't eat up all your resources, nor does it seem bloated in anyway.
phpMyBot is an IRC Bot API developed in PHP.