Arefly

Want some fun in blog?
Like the “I’m Feeling Lucky” Function in Google?
Install this plugin now!
This plugin can Redirect you to the Random post of your blog from a post or a page.
And it is just like “I’m Feeling Lucky”!
<h4>How to use this plugin?</h4>
<ol>
<li>
First install this plugin.
</li>
<li>
Go in to the post/page you want to redirect’s Edit Page.
</li>
<li>
Find Meta Box name “Custom Field”.
</li>
<li>
Click “Enter new”.
</li>
<li>
Enter “random” in Name Table and enter anything in Value Table.
</li>
<li>
Visit this post/page, now you will be redirect to a random post of your blog!
</li>
</ol>
Live Demo: <a href="http://www.arefly.com/try-lucky/" rel="nofollow ugc">Click Here</a> (You will go to a random post of my blog)

WP Random Post

Redirect you to the Random post of your blog from a post or a page.

Four Nodes

Simple plugin to display random posts on your wordpress blog. Plugin provides a widget to display random posts in sidebar. 
Also comes with a shortcode [randomposts] to include on pages.
<ul>
<li>Easy to install</li>
<li>Picks Random Posts</li>
<li>Ability to select from specific category</li>
<li>Limit number of posts</li>
<li>Shortcode support</li>
</ul>

FourNodes Random Post

Displays Random wordpress posts in a sidebar widget. Also, provides shortcode to display random posts on pages.

WP Random Post vs FourNodes Random Post