Georgios Georgopoulos
GWT Mosaic is a widget library for RIA application based on the standard GWT widgets and event model, and, is also based on the gwt-dnd libary for all drag & drop operations. GWT Mosaic is not an alternative to the GWT's widgets, it tries to extend GWT by providing new widgets like the layout managers or use widgets from other frameworks like GWT Incubator's glasspanel, date picker, tables, trees and more.
The LayoutPanel (which extends GWT's AbsolutePanel) is the corner stone for most of the widgets that are implemented. LayoutPanel is using absolute positioning to layout widgets instead of relying on HTML layout. So far, three layout managers are implemented: FillLayout, BoxLayout and BorderLayout. Another very important widget that is missing from GWT standard widget set is the WindowPanel. WindowPanel is based on GWT's DecoratedPopupPanel and is using gwt-dnd for the moving and resizing.
The goal is to provide a complete widget set by keeping the API as close as possible to the GWT's standard widgets API.
GWT Mosaic is licensed under Apache 2.0 like GWT/GWT Incubator and gwt-dnd.
http://code.google.com/p/gwt-mosaic/
GWT Mosaic Showcase (need access to port 8880)
Update : Georgios has pushed a new link for the demo, it now uses the port 80.






