skipstorm

This plugin displays in a widget the latest image from XKCD. It requires php 5.0 to work with curl and dom enabled, features included in most hosting. XKCD images are under creative commons licence so you’re free to display them on your site but you can’t remove the link.
I’m in no way related to XKCD, dough i admire that guy, so i’m not responsible for the content of the website. 
I did not ask permission to create this widget but as mentioned creative commons and so on.

Sk XKCD Widget

This plugin displays in a widget the latest image from XKCD.

cubecolour

This plugin replaces WordPress’s default strong password generator with one to create passwords in a style similar to those described in the <a href="https://xkcd.com/936/" title="XKCD Password Strength comic" rel="nofollow ugc">XKCD Password Strength comic</a>.
The XKCD style passwords are generated on the Add New User and Your Profile Admin pages.
The plugin will generate four word passwords using words of up to seven letters with dashes between the words.
This plugin works on UNIX-based servers (including Linux & MacOS). The words are randomly selected from the operating system’s dictionary list of over 235000 words. As Windows servers do not contain this file, the plugin will have no effect on a Windows server.
In additon to the features of the free plugin, there is an advanced version available from cubecolour called <a href="http://cubecolour.co.uk/downloads/correct-horse-battery-staple-plus/" title="http://cubecolour.co.uk/downloads/correct-horse-battery-staple-plus/" rel="nofollow ugc">Correct Horse Battery Staple Plus</a> which adds the following capabilities and features:
<ul>
<li>Use for self-registered users (single site and multisite)</li>
<li>Use for Password resets</li>
<li>Choice of different number of words in the password</li>
<li>Append a numerical suffix to the password</li>
<li>Option for one of the password words to be all uppercase</li>
</ul>

Correct Horse Battery Staple

Generates new user passwords in a style similar to those described in the 'password Strength' XKCD comic.

Sk XKCD Widget vs Correct Horse Battery Staple