Vaadin

• Vaadin is an ​open source web application framework for ​rich Internet applications.
• In addition, there are Eclipse and Netbeans plugins for easing the development of Vaadin applications as well as direct support (and distribution through) Maven.
• Vaadin applications can be deployed  
  • as Java Servlets to any Java server, including ​Google App Engine.
  • as Portlets to any Java portal, with deeper integration to ​Liferay Portal.
  • Vaadin is a web application framework for Rich Internet Applications (RIA).
  • Vaadin is a large collection of UI components (button , table, tree)'
  • Vaadin is a robust architecture for rapid application development. '