Disqus is a worldwide blog comment hosting service for web sites and online communities that use a networked platform.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
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.
LiteSpeed is a high-scalability web server.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.