wondermill

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.

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.

Robert Peake

Based on the original Random Redirect, this plugin enables efficient, easy random redirection to a post. Supports setting a category for all random redirects, shortcodes to generate URLs that can override the default category, and setting your own redirector URL. Designed to scale to handle high-traffic websites with thousands of posts by using a more efficient strategy than most other redirection plugins employ.
Based on the original Random Redirect by Matt Mullenweg https://wordpress.org/plugins/random-redirect/
Special thanks to Tim Green for providing additional quality assurance testing on the popular rattle.com website.

Better Random Redirect

Based on the original Random Redirect, this plugin enables efficient, easy random redirection to a post. Supports setting a category for all random re …

Random Posts with Thumbnails vs Better Random Redirect