Appcelerator Titanium - Appcelerator Open Source
Sencha Touch - The leading mobile web app framework based on HTML5 for amazing mobile apps.
B4X - Cross platform development tools for native iOS, Android, desktop and server applications.
Onsen UI - HTML5 Hybrid Mobile App UI Framework - work with Angular, React, Vue, Meteor & pure JavaScript. Material & Flat design.
Apache Cordova - Platform for building native mobile applications using HTML, CSS and JavaScript
Quasar Framework - SPA front-end on steroids.