jQuery - The Write Less, Do More, JavaScript Library.
React - A JavaScript library for building user interfaces
Zepto.js - Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API.
Haxe - Haxe is an open source toolkit based on a modern, high level, strictly typed programming language.
qooxdoo - qooxdoo is a universal JavaScript framework that enables you to create applications for a wide...
DHTMLX - JavaScript Library for cross-platform web and mobile app development with HTML5 JavaScript widgets. Easy integration with popular JavaScript Frameworks.