Mickey Kay

Widget Search Filter makes it super easy to find the widget you are looking for by adding a live filter search box to your widgets page. The search box can be used to filter all of your available widgets – simply begin typing the name of the widget you’re looking for, and Widget Search Filter will magically show only matching widgets – all in real time. This can be extremely helpful for sites with lots of widgets, which would normally require excessive scrolling and dragging.

Widget Search Filter

Widget Search Filter allows you to quickly search & filter your widgets in real time. No more excessive searching, scrolling, and dragging.

gobanana

This plugin will output a list of your chosen categories and filter the posts on the fly using jQuery animation.
The setting pages allows you to select which categories should appear, whether or not to include jQuery (if you don’t already have it in the ) and a place to define the posts container. This should be either the class or id of the div that contains all the posts for filtering.
I am open to suggestions to improve the plugin !
<h3>Plugin Site</h3>
http://gobanana.ca/wp-filters

WP-Filters

A live post filtering plugin. Choose which categories to show in the filter and watch the post show/hide without reloading.

Widget Search Filter vs WP-Filters