Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
Appcelerator Titanium - Appcelerator Open Source
BlueJ - BlueJ is an Integrated Development Environment for Java, developed mainly for educational purposes...
React Native - A framework for building native apps with React
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Onsen UI - HTML5 Hybrid Mobile App UI Framework - work with Angular, React, Vue, Meteor & pure JavaScript. Material & Flat design.