Open Source Web Frameworks in Java

Barracuda is an open-source Presentation Framework designed to make it easier to build servlet based webapps by applying proven client-server patterns to the web development paradigm. It features a DOM based templating mechanism for better separation of code from content (default XMLC), a UI component model that provides a series of server side widgets (table, list, template, etc) that make it easy to manipulate DOM structures, and a strongly typed MVC interfaces just like in Swing. With support for multiple markup languages (HTML, WML, XML, etc). It has an event model that provides Model 2 style flow control and allows for true event driven programming on the server. You can add listeners to components and your server-side event handler code will automatically get notified when an action occurs on the client.