Priyanka Bhave

This plugin provides functionality to duplicate the post, pages and the CPT’s with all the custom attributes like taxonomies and post meta data.
How to duplicate the posts, pages or CPT’s :
<ol>
<li>Open the posts, page or CPT on click of the menu from the left menu of dashboard.</li>
<li>Click on the duplicate link display in the post title, on hover of the title name.</li>
</ol>

WP Duplicate posts pages & CPT

Duplicate posts, pages and CPT with all custom data.

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.

WP Duplicate posts pages & CPT vs WordPress Calendar For Custom Post Types