Ext JS!

HTML is great for declaring static documents, but it falters when we try to use it for declaring dynamic views in web-applications. AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.

DHTMLX is a JavaScript library that provides a comprehensive set of UI widgets and makes building web apps easy. Develop killer web apps with DHTMLX!

Wakanda is an open source full-stack JavaScript platform to develop and deploy mobile & Web apps in the enterprise. With Wakanda, you can visually create your data model, associated CRUD operations to user groups, and your data is right away available through an automatically generated REST API. You can use Wakanda’s JavaScript client side connectors to consume the API without effort whether you are using Angular, React, Aurelia or another framework.

Dojo Toolkit is an open source modular JavaScript library (or more specifically JavaScript toolkit) designed to ease the rapid development of cross-platform, JavaScript/Ajax-based applications and web sites.

Enyo is a JavaScript app framework enabling developers build native-quality HTML5 apps that run everywhere — from phones and tablets to PCs and TVs.

Cx is a modern, multi-paradigm web framework inspired by React, Redux, Ext JS, Angular, D3 and other notable open-source libraries. Unlike most libraries which try to do just one thing and do it right, Cx tries to provide all necessary ingredients for building cool web applications. It is particularly convenient for building admin and dashboard applications as it includes a complete set of widgets with form elements, grids, navigation, charts, etc. There is support for inner (form) layouts and outer (app) layouts. The router is built-in if you’re building a single page application. Cx offers very powerful data-binding mechanisms, culture dependent formatting, view controllers and much more. The most important thing is that developing new widgets or modding existing widgets is easy, so each application developed using Cx can have a unique look and feel. »

Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API.

Kendo UI is JQuery-based framework for rich UI, build HTML5 apps that look native on any device, build desktop and mobile applications for any browser.

Gem.js gives you a way to create modular, composable web components and modular, composable styles in pure-javascript. It also includes a set of extensible web components for building visual user interfaces and styling web applications.

MooTools (My Object-Oriented Tools) is a lightweight, object-oriented, web-application framework for JavaScript.

qooxdoo is a universal JavaScript framework that enables you to create applications for a wide range of platforms. With its object-oriented programming model you build rich, interactive applications (RIAs), native-like apps for mobile devices, light-weight traditional web applications or even applications to run outside the browser.