Ivan Storck

The <a href="http://www.sustainablewebsites.com" rel="nofollow ugc">Sustainable Websites</a> WordPress Subcategories Widget displays all subcategories on a WordPress category archive page.
The widget will not show un-necessarily on pages or posts.
This widget is a useful navigation feature that will help your web site visitors drill down into your category hierarchy to find the right category. It is completely style-able with CSS. It’s also good for search engine optimization (SEO) to help your site’s link structure be easily crawl-able.
It’s a simple widget that does exactly what it says! Drag to your sidebar to activate.
Plugin homepage: <a href="http://www.sustainablewebsites.com/wordpress-subcategories-widget" rel="nofollow ugc">WordPress Subcategories Widget</a>
If you have any suggestions please email wordpress (at) sustainablewebsites (dot) com

SustainableWebsites WordPress Subcategories Widget

This WordPress Subcategories Widget displays all subcategories on a WordPress category archive page.

Juan Carlos Pereira Diaz

Display categories as widget on any of your site widgets areas, can display as list or dropdown, you can exclude categories from display, hide categories that does not have any posts and much more.

Custom Categories Widget

Easy to display categories as widget on your sidebar, Customizable settings on the backend

SustainableWebsites WordPress Subcategories Widget vs Custom Categories Widget