Appcelerator Titanium - Appcelerator Open Source
GoodBarber - GoodBarber is a mobile app creation platform.
React Native - A framework for building native apps with React
Fuse - Fuse is a UX tool suite for mobile app designers and developers.
Onsen UI - HTML5 Hybrid Mobile App UI Framework - work with Angular, React, Vue, Meteor & pure JavaScript. Material & Flat design.
Dropsource - Mobile development platform for building native iOS & Android apps