wellflat

This is a plugin which gives you a small card to show your GitHub user profile summary. You just have to put shortcode.
Features include: 
+ GitHub account name and avatar 
+ recently active repository 
+ frequently used language list sorted by repository’s stargazers count 
+ public repositories and gists count 
+ followers count 
+ total stargazers count
Notice: 
This plugin caches GitHub user profile data into the database (expires 4 hours).

WP GitHub Card

This plugin provides simple GitHub profile summary card.

James Robinson

A simple plugin that enables a shortcode for embedding Gist code in WordPress.
The shortcode has two attributes, the Gist source URL and, optionally, the height of the embedded code window.
<pre><code>[gist src="" height=""]
</code></pre>
The Gist <code>src</code> attribute must be the embed URL, for example: https://gist.github.com/imaginarymedia/316a29936e5e7d709665.js
The Gist <code>height</code> attribute is optional and can be any value with a valid CSS unit measure: em, %, px, vh, etc. It will apply a max-height to the gist.
The plugin also creates UI buttons for both the visual and text editors.
If you have suggestions for improvements, please contact us. via the <a href="https://wordpress.org/support/plugin/wp-gist-embed" rel="ugc">plugin support page</a> and if you find this useful, please <a href="https://wordpress.org/support/view/plugin-reviews/wp-gist-embed" rel="ugc">review the plugin</a>.
Developed by <a href="https://jmr.codes" rel="nofollow ugc">James Robinson</a>.
** TO DO ** 
* Validate the gist src URL

WP Gist Embed

This plugin provides Gist embedding via shortcode as well as adding Gist embed buttons to the visual and text editors.

WP GitHub Card vs WP Gist Embed