10Duke SDK - A rapid application development kit for creating new online applications. Dramatically reduce development times from months to weeks.
Grails - An Open Source, full stack, web application framework for the JVM
Dragome SDK - Dragome is a software development kit (SDK) for creating RICH Internet Application(RIA).
Vaadin Framework - Vaadin is a web application framework for Rich Internet Applications (RIA).
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.