muzik

There is already several Categories Widget in WordPress Plugins Database,such as Breukie’s Categories Widget.But when I upgrade my site to WordPress2.8,it doesn’t work any more.So I wrote this.It displays your categories using the wp_list_categories/wp_dropdown_categories function, utilizes parameters for this function.You can set up one or more this widget in your sidebar(s).
<a href="http://phonedelta.com/" rel="nofollow ugc">Live Demo</a>

Alpha’s Categories Widget

Enhanced Categories Widget,Compatible up to WordPress 2.8.

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

Dropdown widget for WooCommerce products with category selection and sorting by price, reviews, or other criteria.

Alpha’s Categories Widget vs Product Dropdown Widget for WooCommerce