Free Software
Apache Struts
Apache Struts is an open-source web application framework for developing Java EE web applications.
Backbone.js
Give your JS App some Backbone with Models, Views, Collections, and Events
Prebid.js
An open source library for publishers to quickly implement header bidding.
Apache Wicket
HelloWorld demonstrates the basic structure of a web application in Wicket. A Label component is used to display a message on the home page for the application. In all the Wicket examples, you have to put all files in the same package directory.
C3.js
D3-based reusable chart library that enables deeper integration of charts into web applications
Apache Camel
Apache Camel is a versatile open-source integration framework based on known enterprise integration patterns.