This is a nice tutorial + free source code of PHP + jQuery live chat system. I really like it, if you want to have a live chat system on you web for customer support or chat box for your community, you may like this simple chat box.
The interface of this chat is clean and simple, the system run smoothly using PHP + jQuery. The chat application is also quite simple. It’s include a login and logout system, AJAX-style features, and will also offer support for multiple users.
You’ll learn from the source code and their tutorial on how to create this chat box is good. You can also chage the box design easily using CSS.
Link : View the tutorial + Download free PHP chat script
Building a jQuery/PHP Powered Chat Room
This is another great Chat script with PHP + jQuey. Building a jQuery/PHP Powered Chat Room