Jquery.livefilter.js is a project mainly written in JavaScript, it's free.
jQuery Plugin: This plugin enable live filter functionailty to given elements. Initially created to use in Fairway DMS.
jQuery Live Filter plugins
Usage Example: $('input[type=text]').liveFilterOf('.items')
Demo: http://fairwayweb.com/jquery.livefilter.js/index.html
Source: https://github.com/eimg/jquery.livefilter.js
Inspired By: Kilian Valkhof's Article (http://goo.gl/Jk4iN)
License: Dual licensed under the MIT or GPL Version 2 licenses. http://jquery.org/license Copyright 2011, Ei Maung (Fairway Web) http://fairwayweb.com/
History: version 0.1, Sep 16th, 2011