Grails - An Open Source, full stack, web application framework for the JVM
iOS Stack - A curated collection of iOS resources for app builders
Vaadin Framework - Vaadin is a web application framework for Rich Internet Applications (RIA).
Lightwell - App creation platform for creatives.
Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.
AppToolkit - AppToolkit provides tools to build iOS screenshots, app landing pages, and to monitor app reviews