The new extjs core has been released in beta. This new version is an amazingly lightweight version of extjs and introduces a variety of new widgets to bring the library more into the front-end of websites with a raft of funky widgets.

Ext Core is a lightweight, high-performance cross-browser JavaScript library for building dynamic web pages. It features:

* Highly portable 25kb file size (minified/gzipped)
* Flexible, permissive open-source MIT license
* Comprehensive 75 page manual written by the Ext team
* The same easy to use API you’re already used to

Click on the screenshot or on the link below for more information.

http://extjs.com/products/extcore/