codeappeal ..feel it

I'm very impressed.. http://vaadin.com it looks very proffessional and great. Of course it's not full web application framework like Wicket and Lift but when you need rich client features on your page vaadin is probably the best choice. You can see comparison with other alternative solutions http://vaadin.com/comparison Vaadin has free license, book, examples etc. Widgets look great and worth to note is that Vaadin applications unlike GWT are run on the server and are inherently more secure since the application logic is not exposed to the client-side. By running the application on a real JVM (on the server) you can use all Java features, libraries and tools.

See video and get your first impressions http://vaadin.com/learn