ZK – Simply Rich

ZK – Simply Rich Open Source Ajax Framework
http://zk1.sourceforge.net/

ZK is an open-source Ajax Web framework that enables rich UI for Web applications with no JavaScript and little programming. With event-driven feature-rich components, developing becomes as simple as programming desktops. With a markup language, designing becomes as simple as authoring HTML. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.