dwieeb

With this plugin, you will be able to include certain CSS or JS files in only selected posts, pages, or other post types, instead of including them everywhere. You can also edit inline CSS & JS and include CSS & JS files from anywhere on specific posts and pages.
It places meta boxes in the WordPress post editor so it’s easy to select which files you want to include with the post you’re currently editing. This plugin works well for all websites, large and small, and it works well with WordPress multi-site (WordPress MU). Tested up to 3.1 beta 2.
See this plugin’s <a href="http://www.danielimhoff.com/wordpress-plugins/specific-files/" rel="nofollow ugc">page</a> on my website for information/comments/questions. I am open to the idea of suggestions and patches to this plugin! If you enjoyed this plugin, please <a href="http://www.danielimhoff.com/donations/" rel="nofollow ugc">donate</a> or <a href="http://www.danielimhoff.com/donations/" rel="nofollow ugc">say thanks</a>.
Todo:
<ul>
<li>Add a “remove references” button on the options page so people can remove file references without having to delete the file.</li>
</ul>

Specific Files

This plugin allows you to include CSS or JS files in specific posts and pages.

blogologist

CSS Cache Buster does one very simple but very powerful thing: it ensures that your 
Wordpress blog delivers the very latest version of your CSS stylesheet to your 
visitors, no matter how often or how rarely your edit for CSS.
You no longer need to worry that you’ve made a CSS change that others won’t see 
because of caching issues at their end.
Technically, this plugin automatically appends a last-modified date/timestamp to 
the end of your stylesheet url.
And since this feature is applied as a filter, you don’t have to touch your theme 
files. It just works.
Simple!

CSS Cache Buster

Always deliver the latest version of your CSS stylesheet to browsers. All caching problems solved.

Specific Files vs CSS Cache Buster