gwt-lab simplifies the development of GWT Composites. The tool uses a WYSIWYG approach to build the Composite's user interface, including its CSS rules. gwt-lab generates the Composite's Java code to include in the user’s favourite IDE, where business logic and event handling is added.

http://jimcampsw.x10hosting.com/Gwtlab.html

Softaria Web Desktop Manager is a solution similar to Windows Explorer or Gnome desktop in Linux. Except, it works in web-browser. Web Desktop Manager allows running GWT widgets in draggable and resizable windows organized in so-called desktops and can be navigated through built-in menu. Web Desktop Manager is a part of Softaria Business Solution - a modular framework designed to construct business applications with rich web interface.

http://www.softaria.com/static/windows

5PM Poker is an all free Texas Hold em Poker site that combines cartoon styled graphics and event driven animations. The site’s continuously running Public Tables challenge players from novice to expert. In addition, the site offers continuously updated information on individual hand strength and odds of winning the hand. The site also allows players to create their own tables and invite friends to play in their own poker network, and offers player-initiated on-demand poker tournaments.

http://www.5pmpoker.com

Vaadin is a server-driven framework for building modern rich web applications in Java. It combines GWT client-side widgets to server-side component model to help developers to create web applications without learning JavaScript or HTML.

http://vaadin.com/

GWT Mosaic is a feature rich toolkit for creating graphical Rich Internet Applications. Offering a complete set of widgets, GWT Mosaic is suitable for projects ranging from small one-off projects to complete application suites.

http://code.google.com/p/gwt-mosaic/