Studiofreya

Plugin is based on jQuery Treeview Plugin and gives an easy Treeview Menu for WordPress categories. It will display the current page or category and all child pages. 
<a href="https://studiofreya.com/wordpress/sf-category-menu/changelog/" rel="nofollow ugc">Plugin website</a>
<h4>Features:</h4>
<ul>
<li>Choose from 5 different styles </li>
<li>Exclude categories</li>
<li>Translation ready</li>
<li>Doesn’t show empty categories</li>
<li>Shortcode to list categories with thumbnails</li>
</ul>
<h4>Live demo:</h4>
<a href="https://sftextures.com" rel="nofollow ugc">Photo website</a>

SF Category Menu

Easy treeview menu for WordPress categories.

alekc

Sometimes you don’t want to show parent directories in permalink because they are not really necessary or because you know that in the future your child directory will change it’s parent.
For example: 
+Work in progress 
–Site 1 
–Site 2 
+Work Finished 
–Site 3
In this case Site 3 originally have been part of “Work in progress”, and on job done it has been moved under “Work Finished”.
So if you install this plugin your link will be transformed in this way:
domain.com/parent_category/child_directory/post_name => domain.com/child_directory/post_name 
domain.com/category/parent_category => domain.com/parent_category 
domain.com/category/parent_category/child_directory => domain.com/parent_category/child_directory

Remove Parents

Remove Parents is a tiny plugin which remove "category" and parent categories from permalink.

SF Category Menu vs Remove Parents