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.

W3netLab Innovations

Taxonomy Extender enhances your WordPress site by:
<ul>
<li>Adding Categories and Tags to Pages: Assign categories and tags to pages just like posts.</li>
<li>Enhanced Categories Widget: Extends the default Categories widget to allow excluding specific categories via checkbox controls.</li>
<li>Enhanced Tag Cloud Widget: Extends the default Tag Cloud widget to allow excluding specific tags via checkbox controls.</li>
</ul>
Features:
<ul>
<li>Assign categories and tags to pages just like posts.</li>
<li>Extends the default Categories widget to allow excluding specific categories via checkbox controls.</li>
<li>Extends the default Tag Cloud widget to allow excluding specific tags via checkbox controls.</li>
<li>Works perfectly out of the box without any additional configuration.</li>
<li>Easy to use and configure.</li>
<li>Follows WordPress coding standards and best practices.</li>
<li>Extend the default WordPress categories and tags without compromising site speed.</li>
</ul>
<h3>License</h3>
This plugin is licensed under the <a href="https://www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">GPLv2 or later</a>.
<h3>Credits</h3>
Developed by W3netLab Innovations.
<h3>Notes</h3>
<ul>
<li>Support: For support, please visit the <a href="https://wordpress.org/support/plugin/taxonomy-extender/" rel="ugc">plugin’s support forum</a>.</li>
<li>Contributions: Contributions are welcome. Please contact the author for more information.</li>
</ul>

Taxonomy Extender For Categories and Tags

Adds category and tag support to pages, and extends the default WordPress Categories and Tag widgets to allow excluding specific categories and tags.

SustainableWebsites WordPress Subcategories Widget vs Taxonomy Extender For Categories and Tags