jQuery

Website: http://jquery.com
License: Dual License – GPL and MIT

jQuery is a lightweight JavaScript library that emphasizes interaction between JavaScript and HTML. It was released in January 2006 at BarCamp NYC by John Resig.

jQuery is free, open source software Dual-licensed under the MIT License and the GNU General Public License.

Microsoft and Nokia have announced plans to bundle jQuery on their platforms, Microsoft adopting it initially within Visual Studio for use within Microsoft’s ASP.NET AJAX framework and ASP.NET MVC Framework whilst Nokia will integrate it into their Web Run-Time platform.

Features

jQuery contains the following features:

* DOM element selections using the cross-browser open source selector engine Sizzle, a spin-off out of jQuery project
* DOM traversal and modification (including support for CSS 1-3 and basic XPath)
* Events
* CSS manipulation
* Effects and animations
* Ajax
* Extensibility
* Utilities – such as browser version and the each function.
* JavaScript Plugins

Source