MindWalker
MindWalker is a mind-mapping tool built using Google Web Toolkit. Find a brief document about our experience with using GWT here.
FireFly
FireFly is an interactive flight planner built with OpenLaszlo with MySQL for a database (the demo uses dummy flight data).
Enterprise Dashboard
Dashboard is a Flash-based server activity monitor. Uses actionscripts and XMLs, with JMX mBeans feeding data from the backend.