Ext Core is a cross-browser JavaScript library for building dynamic web pages. It is lightweight with high performance. The code is clear and maintainable. Ext Core is intuitive with easy to use API as well. You can easily build Carousel, Lightbox, Menu, JSONP, Simple Tabs with Ext Core.

The Carousel example provides a widget for browsing a set of objects. It can be configured to meet any of your specific requirements – auto-play, animations, custom navigation dynamic content and more. The Lightbox example provides a widget used to overlay images on the current page.

The Menu example provides a widget that converts an existing list of links on the page to either a horizontal or vertical menu. The JSONP example shows how you can fetch JSON data from a different domain. It includes a class you can use to connect to any possible web service that supports the JSON format. The Simple Tabs example shows how you can create powerful navigation with only a few lines of code using Ext Core.

Requirements: Internet Explorer 6+, FireFox 1.5+, Safari 3+, Opera 9+
Demo: http://extjs.com/products/extcore/
License: MIT License