Haxe - Haxe is an open source toolkit based on a modern, high level, strictly typed programming language.
AngularJS - AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
EnactJS - An app development framework built atop React that’s easy to use, performant and customizable.
Vue.js - Reactive Components for Modern Web Interfaces
Xamarin.Forms - Xamarin.Forms is an open source cross-platform framework for building native UIs for iOS, Android, and Windows from a single, shared C# codebase.
React - A JavaScript library for building user interfaces