Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
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.
Liferay is an open-source company that provides free documentation and paid professional service to users of its software.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.