Wchat is a popular responsive php ajax inbox messaging (Chat) WebApp for websites, mobile apps and control panels. It is a responsive chating app that is Built with PHP/MySQLI-PDO and design with CSS framework Bootstrap 3.3.6 It utilizes all of the Bootstrap components in its design and re-styles many commonly used plugins to create a consistent design that can be used as a user interface for web and mobile applications.
Demo: https://codecanyon.net/item/wchat-fully-responsive-phpajax-chat/18047319