This is a powerful, trendy, resource friendly, PHP/MySQL ShoutBox. The entire script is coded in PHP and data is stored in a MySQL database to ensure the fastest possible speeds. This new version of the ShoutBox now includes smiley support and makes good use of the PHP nl2br() function.
IRCG is a revolutionary way for dispatching messages to huge groups of users over an arbitrary number of separate communication channels in real-time. IRCG provides message streams over persistent HTTP connections and can interface with a subsystem to produce static file snippets. All aspects of IRCG are scriptable using PHP. IRCG is format and content agnostic, and can produce any output format you require, including XML, XHTML/HTML, and WML.
FreeQboard is the most advanced OpenSource tag board server there is. QBoard supports chat bots, IP to location tracking, and many more features. You want to run your own tag board service, this is what you are looking for.
phpLords ChatBasic is a single domain, web-based chat system with real-time update/refresh. Features: 100% web-based; Simple, user-friendly and integrated interface screen ; Real-time screen refresh; Room with topic/title; Graphics/picture insertion; Multi rooms or channels; The colors, images, rate of refresh can be customized; Control Panel; Easy and fast to set-up and implement on your site.
phpIRC is an IRC layer for PHP, which enables you to use all IRC-features from your own scripts! phpIRC will enable you to code IRC bots, online checkers and the like without any hassle. In its current version 1.2 it is has been improved a lot, both in functionality and stability. For example, it now features OPER support and channel / connection passwords.
A fast, simple, good looking chat script. Features include: easy to customize, shows users online, doesn't use any javascript, doesn't show ugly frames but cute iframes, and much more.
phpMyChat is an easy-to-install, easy-to-use multi-room chat based on PHP and a database, supporting MySQL, PostgreSQL, and ODBC.
It supports some IRC-like commands, and has been translated to 33 different languages.