Darshan Sawardekar

This plugin adds an <code>[xkcd]</code> shortcode tag to WordPress. You can use it to embed the <a href="http://xkcd.com" rel="nofollow ugc">XKCD</a> webcomic into your posts and pages.
It takes a <code>num</code> attribute that specifies the number of the XKCD comic to embed. For Eg:- To embed the 100th comic use,
<pre><code> [xkcd num='100'] </code></pre>
When the <code>num</code> attribute is omitted the latest XKCD comic is shown instead.
<pre><code> [xkcd] </code></pre>

xkcd-shortcode

Adds an [xkcd] shortcode that loads the XKCD webcomic by number.

Garth Mortensen

Display the latest xkcd comic in your dashboard.

Dashboard xkcd

Display the latest xkcd comic in your dashboard.

xkcd-shortcode vs Dashboard xkcd