<a href="http://pjdietz.com/wordpress-plugins/custom-css-js/" rel="nofollow ugc">Custom CSS and JS</a> allows you to add stylesheets and JavaScripts to any individual post by adding custom fields. Both CSS and scripts can be either internal or external. Since this is a plugin, the custom CSS and JavaScript are available to any theme used to display the post, as long as the themes call “wp_head”.
<h3>Using the Plugin</h3>
To use the plugin, add any combination of the following custom fields to your post.
custom_css 
Add an external stylesheet by adding a custom field with the name custom_css. The value of the field should be the path to your css file.
cusrom_css_code 
Add an internal stylesheet by adding a custom field with the name custom_css_code. Include your CSS code as the value. (Do not include the style tags.)
custom_js 
Add an external JavaScript by adding a custom field with the name custom_js. The value of the field should be the path to your script.
custom_js_code 
Add an internal JavaScript by adding a custom field with the name custom_js_code. Include your JavaScript code as the value. (Do not include the script tags.)
<h3>Custom Fields Order</h3>
<ol>
<li>The external styles and scripts are included before the internal ones.</li>
<li>If you include multiple entries for a given field, the entries will be included in order.</li>
</ol>
<h3>Okay, but what if I don’t like those tags?</h3>
Just edit custom-css-js.php and change the constants defined near the top of the file.
<h3>Note</h3>
This plugin only works with individual posts and pages. It does not work for list pages (e.g., the index page, search results).

Custom CSS and JS

Custom CSS and JavaScript allows you to add custom internal and external CSS and JavaScripts to individual posts.

philipwalton

davidosomething

Properly and safely add specific Javascript and CSS stylesheets to single posts, pages, and custom post types.
Features:
<ul>
<li>Dynamic URLs with <code>%HOME_URL%</code>, <code>%SITE_URL%</code>, and <code>%THEME_URL%</code> variables</li>
<li>Script dependency support as well as script duplication checking</li>
<li>The option to load scripts in either the header and footer</li>
<li>Attach scripts to posts, pages, and custom post types</li>
<li>Load attached scripts and styles not just on that post’s page, but on the home page or any other page where that post is displayed.</li>
</ul>
For complete documentation, visit <a href="http://philipwalton.com/2011/09/25/per-post-scripts-and-styles/" rel="nofollow ugc">philipwalton.com</a>

Per Post Scripts & Styles

Properly and safely add specific Javascript and CSS stylesheets to single posts, pages, and custom post types.

Custom CSS and JS vs Per Post Scripts & Styles