GWT-Ext has been superseded by Smart GWT. Smart GWT is an open source (LGPL), GWT-based framework that allows you to not only utilize its comprehensive widget library for your application UI, but also tie these widgets in with your server-side for data management.

Smart GWT Pro & Enterprise add additional server-side features, such as eliminating the need for DTOs, declarative security, and pre-built integration with Spring, Hibernate, JPA, SQL and other popular systems.

Main Page: SmartGWT Pro & Enterprise    SmartGWT LGPL
Support: Enterprise Support Community Forums
Showcase: Pro/Enterprise Demos Core SmartGWT Demos
Docs: FAQ (links to all docs)