Hm. RAD environment with Swing GUI, no downloads yet (2008-08-18), uses an proprietary scripting language, only the Enterprise Edition (2.2 K $) allows to use the Java API. Targeted customer group seems to be procedural developers. What sort of Java product should that be where you need to mention that you can write your own classes??? doesn't seem to use the Java EE API, would be interesting if the "ObjectScript" is interpreted or bytecode.
IMHO too proprietary, goes into the wrong direction for bigger enterprises.
LIMBAS is a web client/server application allowing you to develop application quickly without programming. This, only by the use of tables and forms and other modules like workflow engine, user management, report editor, file manager or soap interface.
An outstanding feature is complete use with an Internet-Browser without installations, Plugins or other components on the client.