GWT is still a relatively new technology that only start to gain popularity when it is released in version 1.4 due to better stability, performance and improved features. Therefore, there is still some learning curve and doubt of how well this technology work in the real business environment.
As such, it is relieved to find that there are two major commerical-graded open-source systems that one can use for learning to develop their own system using GWT.
- QueWeb (http://www.queplix.com)
A Customer Care CRM system.
- DimDim (http://www.dimdim.com)
A video conferencing system that use Flash technology with GWT. The Flash source files are included so it really helpful to see how Flash can be made to work with GWT.