Appcelerator Titanium - Appcelerator Open Source
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
React Native - A framework for building native apps with React
Vaadin Framework - Vaadin is a web application framework for Rich Internet Applications (RIA).
Onsen UI - HTML5 Hybrid Mobile App UI Framework - work with Angular, React, Vue, Meteor & pure JavaScript. Material & Flat design.
CUBA.platform - A Full Stack Enterprise Java Framework with lots of out of the box functionality and amazing...