wTag is a shoutbox (chatbox or mini chat) that is written in JavaScript and PHP, and using Ajax to exchange data with the server without need to reload an entire page. It uses MySQL database as backend. Just take a look at demo here.

• Replace URLs catched in a message with clickable links.
• UTF-8 encoding for multilingual support.
• Compliance with XHTML 1.0 Transitional and CSS.
• Custom designs: it’s easy to change the chatbox look by editing the CSS files.
• A form validation and warnings display system