Razorfrog Web Design

This plugin creates a widget to display and link to WooCommerce products by category in a dropdown menu. Visitors to your site will have one-click access to products in your sidebar (or other widgetized areas) without valuable real estate being used up by a regular products list.
Plugin options include the abilities to:
<ul>
<li>display all products or just products in a single category</li>
<li>sort by product name, price, total sales, number of reviews, date published, date last modified, or random</li>
<li>limit the number of products shown</li>
</ul>
This plugin is also compatible with the <a href="https://wordpress.org/plugins/post-types-order/" rel="ugc">Post Types Order</a> plugin, so you can also sort by your own customized menu order if desired.
With these options you can use this plugin for a variety of uses. You could use multiple instances of the widget to have product dropdowns for each of your categories; you could display the top 5 most frequently bought products in a specific category; you could display the top 20 most reviewed products in your entire store or just in a specific category; and so on.
Note
For sites with a very large number of products, it is not recommended that you display all products in a single dropdown because it would be both heavy on server resources and also just be difficult to use.

Product Dropdown Widget for WooCommerce

Display and link to WooCommerce products in a dropdown menu widget. Allows for display of all products or products in individual categories as well as …

Blaze Concepts

Andrew

Display a list of your best selling WooCommerce products in a widget or shortcode. Simply add the widget to a sidebar or widget area, customise the settings and your list is created.
<h4>Widget Options</h4>
Title – Add a title to your product list. 
Category – Choose one or multiple from a dynamically loaded drop down list of all WooCommerce product categories available on your website. Choose to include or exclude specific categories. 
Products Shown – Show all products or only show a certain number. 
Thumbnail – Show the product thumbnail. 
Star Rating – NEW! Show product average star rating.
<h4>Shortcode Options</h4>
Simply include the <code>[woobsp]</code> shortcode into your posts or pages to show your best sellers. Options include: 
* <code>category='shirts'</code> – Which categories to show product from. You can insert multiple categories by separating with a comma e.g. shirts,hats,shoes. Accepts the category slug or ID (Default: All Categories) 
* <code>posts='2'</code> – How many products to show in your list (Default: 3) 
* <code>thumbnail='yes'</code> – Show the product thumbnail in the list (Default: No) 
* NEW! <code>stars='yes'</code> – Show the product’s average star rating (Default: No)
Full shortcode example: <code>[woobsp category='shirts,shoes' posts='5' thumbnail='yes' stars='yes']</code>
COMING SOON – Choose to exclude specific categories using the shortcode.

Best Selling Products for WooCommerce

A widget and shortcode displaying your best selling WooCommerce products, with thumbnail, title, price, star rating and link to the product.

Product Dropdown Widget for WooCommerce vs Best Selling Products for WooCommerce