Akeda Bagus

The profile appearance mimics the profile page in GitHub. You just simply enter GitHub username and theme for the widget to show off the GitHub profile in a widget.
This plugin depends on <a href="https://wordpress.org/plugins/github-api/" rel="ugc">GitHub API</a> plugin. Make sure to install and activate that first.
Development of this plugin is done on <a href="https://github.com/gedex/wp-gh-profile-widget" rel="nofollow ugc">GitHub</a>. Pull requests are always welcome.

GitHub Profile Widget

Plugin extension for GitHub API plugin for showing off GitHub profile in a widget.

f13dev

If you are a programmer who uses GitHub then why not share your coding projects via your WordPress blog by adding a snapshot 
of your profile as a widget
Simply add the widget to your preferred location and enter your GitHub username.
Features include:
<ul>
<li>Cached using Transient</li>
<li>Displays your GitHub profile image</li>
<li>Shows your GitHub bio, if set</li>
<li>Shows your Location, email address & blog URL if set</li>
<li>Provides links to your followers, following and starred repositories</li>
</ul>

GitHub Mini Profile Widget

Easy to use and a nice design, thanks! 
I didn't need the API key when using a cache timeout of 30 minutes, which is great.

Clean and easy to use

Add a snapshot of your GitHub profile to your website with with this widget.

GitHub Profile Widget vs GitHub Mini Profile Widget