Andrew Norcross

This is a fork / modification of the original ‘Hello Dolly’ plugin. Only instead of those quotes, I’ve included random funny quotes (mainly from twitter). Clearly not earth-shattering, but fun none the less. Please note that the original ‘Hello Dolly’ plugin is not required (or encouraged, for that matter).
<h3>Potential Enhancements</h3>
Umm….more funny? Drop me a line and tell me if you wanna see something

Get Snarky

This is a simple 'replacement' plugin for the original Hello Dolly. A funnier one.

Rami Yushuvaev

This plugin allows you to add random jokes from <a href="http://www.bdihot.co.il/" rel="nofollow ugc">bdihot.co.il</a> website, using the wordpress widget systems.
Display random jokes everywhere on your site. Add as many widgets as you need. Set each widget it’s individual set of options.
Features:
<ul>
<li>Dashboard widgets – random jokes in the back-end for the site operators.</li>
<li>Sidebar widgets – random jokes in the front-end for your users.</li>
</ul>
For more information, installation instructions and screenshots, visit <a href="http://www.bdihot.co.il/wordpress_plugin/" rel="nofollow ugc">plugin homepage</a>.

Random Joke (Bdihot.co.il)

This plugin allows you to add random joke to your site using wordpress sidebar widget.

Get Snarky vs Random Joke (Bdihot.co.il)