Appcelerator Titanium - Appcelerator Open Source
SDL - Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level...
React Native - A framework for building native apps with React
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Onsen UI - HTML5 Hybrid Mobile App UI Framework - work with Angular, React, Vue, Meteor & pure JavaScript. Material & Flat design.
Unity - The multiplatform game creation tools for everyone.