SquirrelTrivia is a Java and PIRC-bot-framework based IRC bot designed specifically for trivia, and plans to include public and private trivia, amd highscores. Attention: Now defunct, please see https://sourceforge.net/forum/forum.php?forum_id=781270
Jatobo (Java TOC Bot) is another Bot connecting to the ICQ and AIM networks via the TOC2 library. For that purpose it uses Jatoli (Java TOC Library) also included in this project. Feel free to use it for your projects.
An IRCbot specifically designed and made for TeenLUG (ex linuxteens). It is written in Ruby with a MySQL database for logging and programming the bot on the fly. PHP would then be used to access the log via a web based frontend.
Randfunc is an IRC bot, written in Perl, featuring things such as database interaction (for channels, chanusers, admins, suspends, etc.), an XML configuration file... and, of course, a few commands.
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An IRC bot written in PHP 5 using OOP, coming with plugin system. It doesn't use any scripting engines other than PHP itself to produce minimal server load. PSbot can run on several channels at one time and supports translations.
hMozart is an IRC Bot written in Haskell; similiar to LambdaBot. It has support for RSS Feeds, maintains a quote database and offers several other small features. The bot is still in development, so features will be added in the future.
SuperJabberBot is a project that aims to implements an extendible and very flexible bot for the jabber protocoll in c++.Chatting with the bot you can control a remote server without ssh, and can also be used as a chatbot, learning language from the chat
An IRC bot written in Java, using the PircBot framework. The bot itself does nothing, as all functionality is implemented through the use of easily-written modules.
A whole set of IRC services meant to be an alternative to Anope, Epona or many others using entirely PHP. While still in early development, possibilities are endless.
Violet 4 is a perl-based object oriented IRC bot engine. It makes writing simple bots a lot quicker and has an easy to learn interface. It also supports reloading all the bot's commands without restarting the bot itself.
A chatbot framework currently implementing the ErkiTalk and irc protocol. By specifying parsers for the server's input one can easily create custom bots (if one can program in java of course ;).
Sitesbot implements a FTP site tracking in form of a bot on IRC. Users are able to populate the database with FTP sites/mirrors and have the script monitor the status of these sites. The script is in TCL, and runs on top of eggdrop.
PHP Atomchat is a free PHPchat script for low volume sites or individual homepages, e.g. P2P chat.
Works OOTB
Completely anonymous
No registration or passwords ever
Emoji auto-conversion
File uploads
Multi-lingual
No database required
AoCBot is a python bot that wraps together IRC and the Age of Conan chatserver. It has some helpful AoC-related features like whois/IRC relay, and offers a very easy way to add your own plugins.