EXT-GWT Question:

GWT uses or supports Java, Apache Tomcat (or similar web container), Eclipse IDE, Internet Explorer, and Internationalization and Localization. Java-based GWT RIAs can be tested using JUnit testing framework and code coverage tools. Because GWT allows compile time verification of images, CSS, and business logic, many common development defects are automatically discovered without need of the manual testing commonly required by RIAs.

Google has noted that some of its products are GWT based:

► Orkut
► Blogger
► AdWords
► Flights
► Wallet
► Offers
► Groups