Drupal is a free and open-source web content management framework.
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.
PHP is a general-purpose scripting language used for web development.
UserWay is a web accessibility overlay for websites that claims to improve compliance with accessibility standards.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.