Claudio Sanches

This plugin adds Github Gists in your posts via shortcode.
Examples
Add a full gist:
<pre><code>[gist id="3837669"]
</code></pre>
Add a specific file in a gist:
<pre><code>[gist id="3837669" file="index.php"]
</code></pre>
<h3>License</h3>
Gist GitHub Shortcode is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published 
by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Gist GitHub Shortcode is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Gist GitHub Shortcode. If not, see <a href="http://www.gnu.org/licenses/" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.

Gist GitHub Shortcode

Adds Github Gists in your posts via shortcode

paul1999

Instead of embedding a <a href="http://gist.github.com" rel="nofollow ugc">GitHub Gist</a> (a <a href="http://pastie.org/" rel="nofollow ugc">pastie</a> like service on steroids) by copying and pasting HTML you can simple embed it with a [gist] shortcode.
For example, to embed the <a href="http://gist.github.com/30948" rel="nofollow ugc">gist: 30948</a> enter this in a post or page:
<pre><code>[gist id=30948]
</code></pre>
It is that simple.
One problem with gists is that a search engine spiders (and users with javascript disabled) will not see your code in a blog entry. This plugin allows you to get around this by including text, such as content of the gist inside the shortcode. The text is wrapped inside these tags:
<pre><code><noscript><code class="gist"><pre>
</code></pre>
You would use it like this:
<pre><code>[gist id=30948]
puts hello_world_test;
i = 0
5.times do
 i = i + 1
 puts i
end
[/gist]
</code></pre>
The content inside a gist shortcode is optional.
View the <a href="http://svn.wp-plugins.org/github-gist-shortcode/trunk/CHANGELOG" rel="nofollow ugc">CHANGELOG</a> to see what has changed between versions.

GitHub Gist Shortcode Plugin

Allows the use of a simple shortcode to embed GitHub Gists in a post or page.

Gist GitHub Shortcode vs GitHub Gist Shortcode Plugin