Google Web Toolkit. GWT is a development toolkit for building and optimizing complex browser-based applications.
Initially developed by Macromedia and then acquired by Adobe Systems, Flex was donated by Adobe to the Apache Software Foundation in 2011 and promoted to a top-level project in December 2012. Overview Versions Flex Tutorials. Cappuccino Web Framework. JavaServer Faces. Seam. Struts. Tapestry. SpringSource. Spring. Grails. Wicket. Wicket-rest.