AJAX Shoutbox
This module adds chat functionality to your Joomla site. Much like an instant messenger.
All users of your site to write and respond in the chat, the texts will be published instantly. Also suitable for instant messaging. Posted in AJAX, but also compatible with Joomla 1.5.x Joomla 1.0.x
Some features:
Live Updates
BBCode Support
Disable Guest
Guest tags
CSS Styling
Smilies in the text
Option to allow only registered users to write in your joomla.
There is also a Pro version extends the free version.
List of all shouts in Stock
Captcha
BAN by keyword
Audible Alarm
IP Bans