Justin Tadlock

Hybrid Hook is a plugin that allows end users the ability to tap into the <a href="https://wordpress.org/extend/themes/hybrid" title="Hybrid WordPress theme framework" rel="ugc">Hybrid theme’s</a> extensive hook selection by providing a user interface in the WordPress admin for adding custom content.
You must be using at least version 0.9 of the <a href="https://wordpress.org/extend/themes/hybrid" title="Hybrid theme" rel="ugc">Hybrid theme</a> for this plugin to work. It will also not work with any other themes.
Features:
<ul>
<li>Ability to add custom HTML nearly anywhere on your site.</li>
<li>Use shortcodes to quickly add content.</li>
<li>Allows the input of JavaScript.</li>
<li>User can select the priority the code will run.</li>
<li>Can execute PHP code if the option is selected.</li>
</ul>

Hybrid Hook

Allows the addition of HTML, shortcodes, PHP, and/or JavaScript to the Hybrid theme's hooks from the WordPress admin.

jtgraphic

Do you ever have a really hard getting your code formatted correctly in a post? Or do you ever have issues preserving tabs?
Plum Code Box makes it easy to insert and manage code blocks using the Chili javascript syntax highlighter. The plugin adds option boxes to post and page 
editors. There are also other <a href="http://codeplum.com/wordpress-plugins/" rel="nofollow ugc">WordPress Plugins</a> available from Code Plum.
Twitter: @codeplum
Website: http://codeplum.com
<h3>Donations</h3>
You may make donations at http://www.codeplum.com

Plum Code Box

Plum Code Box makes it easy to insert and manage code blocks using the Chili javascript syntax highlighter.

Hybrid Hook vs Plum Code Box