Vaadin: Java web application framework
Vaadin is a Java web application framework. It is designed for creating rich and interactive applications that run in the browser, without any plugins. A server-driven architecture together with reusable component model is used to simplify programming of applications and for better web application security. No HTML, XML or JavaScript necessary and all Java libraries and tools at your disposal.
Vaadin is is designed to build web applications, not just web sites. This positions it for application development rather than website development. The programming model is much like in traditional desktop programming too with events and listeners rather than requests and responses. If you have written Swing or SWT-applications you'll feel right at home with Vaadin. The most significant differences between Vaadin and other web application libraries are summarized in the comparison matrix.
GWT applications run in the browser while Vaadin applications run on the server. We do actually use GWT as a "rendering engine" on the browser side so you can combine Vaadin and GWT.
