Vitalii Rizo

This is a small plugin for WordPress which adds extra product sorting option: Featured First then Random. It can be very useful for stores with a large amount automatically imported items, e.g., from AliExpress.
It works perfectly with WooCommerce v. 2.3 and newer.
It is available in English and Russian for now.
<ul>
<li>This plugin uses Session seed (unique session id) to randomize item order so you can use random product list even with pagination!</li>
<li>It is automatically reset when user opens the first page or by timer (every hour/day. Timer starts when user opens your store).</li>
<li>Demo web-site is available <a href="http://toryjoy.ru/shop/?orderby=featured_first_then_random" rel="nofollow ugc">here</a>.</li>
</ul>

Featured First then Random for WooCommerce

This is a small plugin for Wordpress which adds extra product sorting option: Featured First then Random. It can be very useful for stores with a larg …

LordPretender

This plugin adds a drop-down list with the ability to sort your blog posts :
<ul>
<li>by title</li>
<li>by date (newest to oldest)</li>
<li>by date (oldest to newest)</li>
<li>sort by date last modified</li>
<li>randomly</li>
</ul>
You can find a demo here : http://www.spoils.fr/ 
The widget is named “Trier les articles” on the sidebar.
<h3>Configuration</h3>
<ul>
<li>Widget title: the title of the widget</li>
<li>3 checkboxes in order to display or not items in the drop-down list.</li>
</ul>
Since the version 2.0.0, it is now possible to change the default order for your categories. 
In the category editing page, you will now find a dropdown list.

Posts Order Widget

Add the ability to sort the posts by context rather than descending date.

Featured First then Random for WooCommerce vs Posts Order Widget