Apache is a free and open-source cross-platform web server software.
Apache Tomcat is an open-source implementation of the Java Servlet, JavaServer Pages, Java Expression Language and WebSocket technologies.
cdnjs is a free distributed JS library delivery service.
Google Web Toolkit (GWT) is an open-source Java software development framework that makes writing AJAX applications.
Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
jQuery CDN is a way to include jQuery in your website without actually downloading and keeping it your website's folder.
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.