Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
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.
Responsive navigation plugin without library dependencies and with fast touch screen support.
Typekit is an online service which offers a subscription library of fonts.
Video.js is a JavaScript and CSS library that makes it easier to work with and build on HTML5 video.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.