opencart

This is very simple chat system with the basic features:
Ajax chat, auto update. Display as IPS widgets, so you can place it in sidebar or top page. Sound notification. User can toggle on/off. Block users. Announcement (on Top or Tab). Support emoticons, URL, Image URL (gif, png, jpg) @mention by clicking on usernames. Flood control. Time format. Display newer messages in top or bottom. Permissions for viewing, chatting & management. Edit/Delete messages.

Demo: http://ipsviet.com