Bot-IRCBot is a project mainly written in Perl, it's free.
A bot for IRC using Perl.
A simple, modular, Perl-based IRC bot.
List of plugins:
-- YouTube -- Automatically gives info on YouTube links posted.
-- GoogleImages --
Responds to the command: !gis
-- Lolcat -- Responds to the command: !lolcat Returns a link to a random lolcat in the chat.
-- UrbanDictionary --
Responds to the command: !urbandictionary