Fuse - Fuse is a UX tool suite for mobile app designers and developers.
OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
Vaadin Framework - Vaadin is a web application framework for Rich Internet Applications (RIA).
GoodBarber - GoodBarber is a mobile app creation platform.
Grails - An Open Source, full stack, web application framework for the JVM