Zechat easy to integrate Gmail/Facebook style chat into your existing website. Zechat is instant messaging chat app, php ajax chat script, real time chat script.
Demo https://codecanyon.net/item/facebook-style-php-ajax-chat-zechat/16491266
Downloadhttps://www.filecad.com/ifgV/Zechat-v1.5---Facebook-Style-Php-Ajax-Chat.rar