Luis Peel

This plugin provides a simple and powerful interface for managing custom post type slugs. With it, you can:
<ul>
<li>View: See a complete list of all custom post types registered on your site.</li>
<li>Edit: Quickly and safely change the slug of any custom post type. For example, you can transform “vehicle” into “car” for shorter and more descriptive URLs.</li>
<li>Delete: Completely remove the slug of a custom post type, simplifying your URL structure.</li>
</ul>
Example:
If you have a custom post type called “vehicle” with a URL like <a href="https://www.yoursite.com/vehicle/mycar" rel="nofollow ugc">https://www.yoursite.com/vehicle/mycar</a>, this plugin will allow you to change the slug to “car” to get the URL <a href="https://www.yoursite.com/car/mycar" rel="nofollow ugc">https://www.yoursite.com/car/mycar</a> or even remove it completely to have <a href="https://www.yoursite.com/mycar" rel="nofollow ugc">https://www.yoursite.com/mycar</a>.
Benefits:
<ul>
<li>Greater control over your URLs.</li>
<li>Flexibility to adapt URLs to your specific needs.</li>
<li>Ease of use thanks to its intuitive interface.</li>
</ul>

Custom Post Type Slug Manager

Easily edit or remove slugs for any custom post type. Customize your content URLs without coding.

A new widget that shows a calendar based on existing post types.
<ul>
<li>Select any available post type to show</li>
<li>Filter by any custom taxonomy term tied to the selected post type</li>
<li>List a maximum of 10 items below calendar</li>
<li>Set a prefix for every listed item</li>
<li>Filters and hooks</li>
</ul>

WordPress Calendar For Custom Post Types

Because the builtin calendar doesn't have such an option.

Custom Post Type Slug Manager vs WordPress Calendar For Custom Post Types