cdnjs is a free distributed JS library delivery service.
Internet Information Services (IIS) is an extensible web server software created by Microsoft for use with the Windows NT family.
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.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Configurable JavaScript/CSS spinner that can be used as a resolution-independent loading indicator
UserWay is a web accessibility overlay for websites that claims to improve compliance with accessibility standards.