update : 23/12/2020 GWT

Google Web Toolkit is an RIA framework developed by Google, whose version 1.0 dates back to 17 May 2006.

GWT enables the development of elaborate applications in pure Java that is "compiled" in JavaScript and HTML. The result is an extensive application that adheres to web standards, unlike technologies such as Flex and Silverlight, which require the installation of a special plug-in on client workstations.
GWT's XML format for interface descriptions allows for rapid development. However, because GWT generates all its interface views using XML and Java, it is, paradoxically, very difficult to integrate a HTML layout, which requires time-consuming, manual integration that consists of a translation of the layout in XML and Java.
GWT is distributed under the terms of the Apache License.
GWT can be used to create and maintain dynamic web applications that implement JavaScript, using the Java language and tools.