GWT Developer's Tools: "gwtDeveloper is a WYSIWYG tool to design your GWT applications. It is a extension for JDeveloper. You can get it using JDeveloper's Check for Updates mechanism.
Windows version is available now. Linux/Mac version may be in the future.
See it's documents.
GWT UI Editor
Features:
* Visually design your panels, composites, menus and other widget types
* View, change your widget's properties using Property Inspector
* Add event handlers to your widgets"
