AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenLayers is an open-source JavaScript library for displaying map data in web browser.
Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps.