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.

theseforumslookquitehelpful

This plugin was built to add a “Random” Product Sorting Order to WooCommerce with working pagination.
Other solutions I found that added a “Random” Product Sorting Order did not preserve pagination.
This plugin will sort your WooCommerce Products in random order. A random sort has a transient life of one hour. (In version 0.9.1, the duration is not a settable option. It is fixed at one hour.) Every hour a new random sort is generated. Pagination works as expected, meaning each WooCommerce Product will be diplayed once and no more than once.
This plugin requires the WooCommerce plugin.

WooCommerce Random Product Sorting with Pagination

Add a "Random" Product Sorting Order to WooCommerce with working pagination.

Random Posts with Thumbnails vs WooCommerce Random Product Sorting with Pagination