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The YUI Library is a set of utilities and controls, written with JavaScript and CSS, for building richly interactive web applications using techniques such as DOM scripting, DHTML and AJAX. YUI is available under a BSD license and is free for all uses.

YUI is provenscalablefast, and robust. Built by front end engineers at Yahoo! and contributors from around the world, it's an industrial-strength JavaScript library for professionals who love JavaScript.

The project maintained by Yahoo Developer Network and the source can be downloaded form Git-hub.

Project URL

http://developer.yahoo.com/yui/

Below is the list of various modules that YUI library offers.<!>