Fineswap

This plugin will make developers and site builders (hopefully very) happy.
It enables site administrators to supply additional styles or/and scripts to 
be loaded alongside the theme’s resources. It will work regardless which 
theme the site is running, which makes it brilliant for adding custom 
programming and content blocks.
Styles and scripts can be either entered manually or loaded from 
external URL’s.
Brought to you by <a href="http://fineswap.com/?utm_source=wordpress&utm_medium=plugin&utm_term=readme-desc&utm_campaign=custom-resources" title="A blog and a mobile app advocating sustainability and green living" rel="nofollow ugc">Fineswap</a> Team.

Custom Resources

Easily load additional styles and scripts (for both front and backend pages). Works by direct inline embedding or by using URL's.

Zane Matthew

This plugin places a comment form similar to Facebook, only displaying a single line textarea, which submits when the user presses “enter/return” on their keyboard.
<h4>Features</h4>
<ul>
<li>Single line textarea</li>
<li>Auto expanding textarea</li>
<li>AJAX submitted comments</li>
<li>AJAX loaded comments</li>
<li>Admin settings for additional styling</li>
</ul>

Inline Ajax Comments

Displays a single line textarea for entering comments, users can press "enter/return", and comments are loaded and submitted via AJAX.

Custom Resources vs Inline Ajax Comments