Dent Bot
This is an Internet Relay Chat (IRC) bot, capable of sending and receiving messages based on certain triggers

Pothead
Pothead The 2nd is an ircbot. It has a weight converter, a date matching system to tell people if there relationship is hot or not. It has a learning database to allow users to add information into a database about a topic. It also replys to ctcp time, version and ping.

Tuxaator
Tuxaator code provides you a lightweight IRC bot/dictionary, easy to set up and to localize.

WebChat
WebChat is a useful application that allows a number of people on the World Wide Web to talk to one another simultaneously.

Anonymous Chatterbox
Anonymous Chatterbox allows you to install a simple chat system on your site.

Ethereal Realms
Ethereal Realms is a concept chat and role play system that has acquired additional components such as social networking, galleries and message

Atheism
Atheism is an extremely flexible and configurable multi purpose Perl script for X-Chat.It's main features include: - Advanced auto-away functions. - Announcement of away reason on selected channels. - Announcement of coming back, and of time you were gone. - Logging of messages addressed to you while away.

SFE Chat
SFEChat is a real-time chat cgi for the web. It lets you hold real-time conversations on a web page. Users log in, and then can type what they'd like to say into a text box, and hit "Enter" or click a button. The chat window refreshes itself every 10 seconds or so (you can configure the time between refreshes), so that others looking at the page will be able to see the new addition

Chat N Time
Chat-N-Time is a simple Perl real-time chat cgi for the web. It lets you hold real-time conversations on a web page. Users log in, and then can type what they'd like to say into a text box, and hit "Enter" or click a button.

Ralf's Chat
Ralf's Chat is a free chat script written in Perl and released under the GNU GPL. It supports multiple rooms, language files, a DBI for MySQL (optional), streaming (requires MySQL) and a lot more.

Blue Chat
BlueChat is a fast, free, web based chat program with many features. Color codes, smileys, actions, multiple channels, chat logging, and curse word filtering. Works with both UNIX and Windows servers.

Chatter Box
ChatterBox script helps you to setup your own chat room on a website.

CGI:IRC
CGI:IRC is a Perl/CGI program that lets you access IRC from a web browser, it is designed to be flexible and has many uses such as an IRC gateway for an IRC network, a chat-room for a website or to access IRC when stuck behind a restrictive firewall.

IEZCHAT
IEZChat Perl Script is a very easy CGI Script that allows you to install a basic HTML chat on your site.