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.

Benoti

A well known tools dedicated to admin posts.
Switch from the original post-type to another post-type.
Duplicate post, page or any post-type object.
The Post-type switcher is an evolution from the Post-type Switcher of John James Jacoby
General options:
<ol>
<li>Enable of the tools independently of each other.</li>
<li>On demand plugin options deletion.</li>
</ol>
Switcher & Duplicate options:
Post type Switcher:
<ul>
<li>Quick edit switcher</li>
<li>Bulk switcher</li>
<li>Post edit screen switcher</li>
<li>enable switch for post type in settings panel</li>
</ul>
Duplicate:
<ul>
<li>Quick edit link</li>
<li>Post edit link</li>
<li>new post title with old ID</li>
<li>enable or disable taxonomy copy</li>
<li>enable or disable custom fields copy</li>
<li>works with any post-type</li>
</ul>

Brozzme Switch and Duplicate

It's easier to get these tools embed in one plugin

Make the job

A set of tools dedicated to post type, Post-type Switcher and Post Duplicate (works with any custom post-type).

WP Duplicate posts pages & CPT vs Brozzme Switch and Duplicate