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.
Mailcheck is a JavaScript library designed to address the issue of misspelled email addresses during user input.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
TYPO3 is a free and open-source Web content management system written in PHP.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.