wondermill

<p>If you want to graphically display a random list of your posts with their featured image in the side bar, then this is the plugin for you. This plugin allows you to set the category IDs (or all categories) you want to pull the random posts from, the number of random posts to display, the maximum width and height of the featured image thumbnail, the widget title, and the colors of the surrounding box.</p>


Random Posts with Thumbnails

Puts a list of clickable random posts with their featured image in your sidebar as a widget, this list is customizable.

Shashi Dhar Kumar

<p>This simple plugin is a widget that displays a list of random posts on your sidebar. You can exclude certain posts by ID.</p>
<h3>Bug Fix</h3>
<p>Small bug has been noticed by one of user into post status has been fixed now.</p>
<h3>Configuration</h3>
<ol>
<li>Widget Title: the title of the widget</li>
<li>No of Post: Number of random posts you would like to be display</li>
</ol>


Random Post for Widget

This simple plugin is a widget that displays a list of random posts on your sidebar. You can exclude certain posts by ID.

Random Posts with Thumbnails vs Random Post for Widget