Vaadin is a powerful open source UI library for creating rich web user interfaces. It is a Java EE compatible component library that makes it easy for Java developers to create stunning web applications. No need for JavaScript or XML programming - just use Java:
Label l = new Label("Hello Vaadin User");
layout.addComponent(l);
In addition to dozens of built-in components the Vaadin Directory at https://vaadin.com/directory provides almost 500 extra widgets and components for building your application.
The Vaadin Plugin for Eclipse comes with project wizard and samples and WYSIWYG visual designer and wizards to speed up the development.
Vaadin Ltd offers professional tools and support for the framework. Learn more at https://vaadin.com/tools-and-services