Akeda Bagus

This plugin doesn’t contain any feature (widget or shortcode) that you can use directly once the plugin is activated. This 
plugin contains API to help you in making a call to GitHub API resources. There’s <code>includes/tools.php</code> file that show 
you how to use the API from this plugin to make a call to various GitHub resources (for instance to get repository information).
Development of this plugin is done on <a href="https://github.com/gedex/wp-github-api" rel="nofollow ugc">GitHub</a>. Pull requests are always welcome.
If you’re looking for widget or shortcode you can try following plugins (which depend on GitHub API plugin):
<ul>
<li><a href="https://wordpress.org/plugins/gh-profile-widget" rel="ugc">GitHub Profile Widget</a></li>
<li><a href="https://wordpress.org/plugins/gh-members-showoff" rel="ugc">GitHub Members Show-off</a></li>
</ul>

GitHub API

This plugin contains easy-to-use API that uses WP HTTP API to make a request to GitHub API v3 resources.

Good caching policies is one of performance’s best friends, and it can be your new best friend too. Get friendly with intermediary and browser caches by taking control over your WordPress powered website’s HTTP <code>Cache-Control</code> headers.
This is not a caching plugin in itself, but will enable you to leverage existing standard compliant caching systems better. You can set different policies for different kinds of pages to suite your website’s needs. The Cache-Control for WordPress plugin allows you to set different policies for shared/intermediary and private caches. The plugin sets some sensible defaults for a medium traffic blog that publishes an update or two per week.
You can safely set long <code>Cache-Control</code> times as the <code>max-age</code> values is lowered automatically before a scheduled post is about to be published.
Private pages (logged in users, the admin interface, etc.) will not be cached.
The plugin has <a href="https://www.ctrl.blog/entry/wp-cache-control-documentation.html" rel="nofollow ugc">extensive documentation</a>.

Cache-Control

Configurable HTTP Cache-Control response headers for webpages generated by WordPress.

GitHub API vs Cache-Control