AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
Joomla is a free and open-source content management system for publishing web content.
LiteSpeed is a high-scalability web server.
Open Graph is a protocol that is used to integrate any web page into the social graph.
PHP is a general-purpose scripting language used for web development.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.