Chatness provides some of the best in performance, style, and usability.
BSEditor: Installation
Easy to use install
Comprehensive help for each step
Get Up and running in just a few short minutes!

Backend
Full MySQL support
Utilizes JavaScript, PHP, and MySQL
Supports MySQL sockets and ports.
Uses inline frames rather then regular frames (meaning better style control)
Multi-Browser support (tested on Internet Explorer, Mozilla Firefox, and Netscape 6)

Chat Elements
Full formatting (Font, size, and color) Get more with Pro!
Private Messenging
Emoticons
Auto Idle and Kick
Ignore/Unignore Users
No chatlog flickering
Join/Exit messages
Comprehensive help for users and admin

Administration
Easily set and unset options
Clear chatlog table
Clean users list (easily remove users who arent there)
Edit templates online
Boot/Unboot users
Add/Remove Emoticons
Stats panel
Easily integrate stats to anyones website
No PHP required to integrate stats
Show users, log, top chatter, etc...
Easily contact support you can free download Chatness 2.5.3 now.