1. Apache Flex
2. Ext JS
Ext JS is a pure JavaScript application framework for building interactive web applications[1] using techniques such as Ajax, DHTML and DOM scripting. It is built as an add-on library extension of YUI by Jack Slocum, Ext JS includes interoperability with jQuery and Prototype.
3.jQuery Easyui
4. jQuery UI
jQuery UI is a JavaScript library that provides abstractions for low-level interaction and animation, advanced effects and high-level, themeable widgets, built on top of the jQuery JavaScript library, that can be used to build interactive web applications. It was released in September 2007, announced in a blog post by John Resig on jquery.com
5. GWT
Google Web Toolkit (GWT) is a development toolkit for building and optimizing complex browser-based applications. GWT is used by many products at Google, including Google AdWords and Orkut. It's open source, completely free, and used by thousands of developers around the world.
6 YUI
YUI is a free, open source JavaScript and CSS framework for building richly interactive web applications.Development on YUI began in 2005 and Yahoo! properties such as My Yahoo! and the Yahoo! front page began using YUI in the summer of that year. YUI was released for public use in February 2006. It is actively developed by a core team of Yahoo! engineers.
7. Sencha
8. Dojo
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. It was started by Alex Russell, Dylan Schiemann, David Schontzler, and others in 2004.
9. ZK
10. JavaFX
Reference : http://blog.jobbole.com/24480/