microkid

This generates meta descriptions for your posts automatically, using the format explained on the Official Google Webmaster Central blog in <a href="http://googlewebmastercentral.blogspot.com/2007/09/improve-snippets-with-meta-description.html" title="Improve Snippets With Meta Descriptions" rel="nofollow ugc">this article</a>. It uses author, post date, categories, number of comments and, when available, tags.
<h3>Compatibility</h3>
Although this plugin is still in BETA it should work with these other plugins:
<ul>
<li>Ultimate Tag Warrior – If you are using WP 2.3+ with native tag support my plugin will use those tags, if you have a lower version and UTW installed it will use those.</li>
<li>All in One SEO Pack – Make sure you switch of the “Autogenerate descriptions” option for this plugin or you will have two meta descriptions in your page, which can’t be good!</li>
<li>TDO Mini Forms – My plugin will grab the author of the article when it’s been submitted through this plugin.</li>
</ul>

Improved Meta Description Snippets

This generates meta descriptions as advised by the Official Google Webmaster Central blog.

Pat O'Brien

Own your snippets! No longer require the use of a cloud service to host your snippets for you when you can host them right on your own WordPress site! codeSnips allows you to quickly add and embed code snippets to your website with syntax highlighting available for 124 languages! codeSnips uses custom post types where you create a new snippet post, select the programming language, enter the code snippet and publish the post. You then can either access the snippet post directly for sharing, or embed it into another post using the shortcode.
View all of your snippets in an archived list, or even on the snippet page itself – without embedding into a new post. You can access all your snippets using a customizable pretty URL permalink. For example: http://yoursite.com/snippets
You can also view the raw plain text snippet directly, which is ideal for copy & pasting.
Features:
<ul>
<li>Quickly add new snippets with syntax highlighting available in 124 programming languages. </li>
<li>Plain text snippets are supported.</li>
<li>Syntax highlighting changes dynamically if you select a new code language from the dropdown while editing.</li>
<li>Embed the snippets using a shortcode that has many options.</li>
<li>You can embed multiple snippets per post.</li>
<li>Access a snippet post directly via URL.</li>
<li>Access a plain text raw view of the snippet directly via URL. Ideal for copying snippets.</li>
<li>Set a description for the snippet post that will display right on the snippet post page.</li>
<li>Change the URL slug for the list of snippets to suit your site.</li>
<li>Work with a particular code language a lot? Select a default snippet code language.</li>
<li>Each snippet also has a filename field that you can use as a reference for that snippet.</li>
<li>Uninstalling the plugin will clean up all data it has stored in the WordPress database.</li>
</ul>
The default list of snippets will display as a post archive list using your theme. You can customize the way this list looks by simply adding a file in your theme called “archive-snippets.php”. Likewise, if you add a theme file called “single-snippets.php” it allows you to customize the way the direct snippet pageis rendered. There are examples located included with the plugin under the “templates” folder.

codeSnips

A very good plugin to maintain a code listing. Well conceive and Jetpack Markdown compatible.



Need some code library ?

I like the approach,
It allows to have more readable post tutorials writing process, by outsourcing the code snippets (than can sometimes can be long) on their own post types.
More, it allows to have archive and shortcode if you want to use it somewhere else.
Pretty nice !



Intersting

Quickly create and embed individual code snippet posts. Access the snippet post directly, view raw, or show all snippets in an archive list.

Improved Meta Description Snippets vs codeSnips