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.
YooMoney is an IT company working with electronic payments on the Internet, creating and supporting financial services for individuals and businesses.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.