jPFChat is a CHAT component that you can install into your Joomla website.  After installation, you can have live chat sessions on your site with your site visitors, and they can chat with each other.

The v2 release of jPFChat is written to be fully compatible with the MooTools javascript library that's native to Joomla.   Unlike earlier versions of jPFChat, there are no more MooTools conflicts to worry about, and therefore no "work-arounds" to deal with.