Quentin

<p>Allows to define shortcodes for easy replacement. Handy for recurrent copy/paste’s from sites like YouTube or DailyMotion… But not only. You decide! Also allows you not to write un-valid tags that would be stripped out by WordPress (<code><object></code>s for example)</p>
<p>The syntaxt is Shortcodes’ one, but for legacy reasons you can use this syntax : [key:parameter1,parameter2,parameter3…]</p>


Snips

Easy snippet/Shortcode editor plugin for Wordpress

Allan Collins

<p>This plugin will allow you to add code snippets to your pages/posts.  This is great for code tutorial sites.</p>
<h3>Upgrading</h3>
<p>If you are upgrading from version 1.0, you will see an option on the Code Library page that will allow you to upgrade.  As a precautionary measure, be sure to back up your database before doing so.</p>


WordPress Code Snippet

This plugin will allow you to add code snippets to your pages/posts.  This is great for code tutorial sites.

Snips vs WordPress Code Snippet