Google Analytics is a free web analytics service that tracks and reports website traffic.
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.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps.
Variti is a network security solutions firm that blocks bad bots, protects users from various automated abuse, attacks and fraud techniques.