Jesper van Engelen

Ever since the WordPress roles and capabilities system implemented in WordPress verion 2.0 back in 2005, there has been no easy way to implement a user hierarchy.
With the User Hierarchy plugin, you can control which user roles can edit which other user roles. For example, you can add a new user role called “Manager” that can view all users, but only create and edit users with the “Author” user role. This plugin gives you full control over your user management, even when you are using a complex role hierarchy.

User Hierarchy

Control user management on a per-role basis. Allow users of a certain role to only add, edit or delete users from specific other roles.

Amin Nazemi

This plugin disables Pagination in navigation menu lists and preserves taxonomy hierarchy. 
Also, it helps you when you using WooCommerce and you have more than 50 category items. 
It can preserve WooCommerce category hierarchy.
FEATURES
<ul>
<li>Disable Pagination in nav menu add item lists </li>
<li>Preserve hierarchy in category nav menu add item list and posts category selector</li>
<li>Automatically scroll to first checked item in post category selector </li>
<li>Preserve WooCommerce category hierarchy</li>
</ul>

Preserve Taxonomy Hierarchy

Preserve hierarchy in posts category and navigation menu editor lists.

User Hierarchy vs Preserve Taxonomy Hierarchy