This libraries add some features to the best CMS of the World, Joomla!.

This library is used to authenticate RESTful communications using the "Joomla CMS Web Services API Specification"

https://docs.google.com/document/d/1FVKGlV6BN6pu-YH2WR2pQHE3Ez7M6r7LD417GSw9ZSo/edit?usp=sharing

by http://docs.joomla.org/Web_Services_Working_Group

This library can convert your Joomla! website in a HTML5 WebSocket server that can share real-time communications between server and client browser.

http://www.w3.org/TR/2009/WD-websockets-20091029/

This article explain how to integrate WebSocket with Joomla!. It was writed time ago, new article is comming using Joomla! 3.0+

http://magazine.joomla.org/issues/issue-jan-2012/item/652-Integrating-WebSocket-to-Joomla