Duoc Nguyen

This plugin use BasketJs to cache all your javascript file to browser’s localstorage for faster caching.
Your can readmore about BasketJs at here : <a href="http://addyosmani.github.io/basket.js/" rel="nofollow ugc">BasketJs</a>
For developer, you can contribute to this plugin by fork and make pr on github : <a href="https://github.com/nguyenvanduocit/wp-basketjs" rel="nofollow ugc">BasketJs on github</a>

WP BasketJs

This plugin use BasketJs to cache all your javascript file to browser's localstorage for faster caching.

tonnaer

A minimalistic plugin that lets you add scripts to any page or post. 
The scripts will be added to the beginning and/or end of the ‘content’ of the page/post.
A very easy way to add for example Google Adwords conversion tracking code to a page. 
And with the new feature, you can also use it to add the Google Website Optimizer code and splittest your landingpages.

Creative Clans Embed Script

A plugin to add scripts to the beginning and/or the end of the 'content' of any post or page.

WP BasketJs vs Creative Clans Embed Script