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.

George Pattichis

Simple CPT is a free WordPress plugin that lets you create custom post types and custom taxonomies (eg: categories, tags, etc.) directly from your admin dashboard without writing a single line code.
No more editing files manually. With Simple CPT you can create a new Custom Post Type in less than 1 minute.
This plugin is written using only native functions, included in WordPress core, so it does not in any way reduce the performance of your website and will not cause any compatibility problems. Simple CPT is completely free, it will save you time and it is compatible with almost all themes and plugins out there.
In just a few minutes you can adapt your WordPress site to any type of project in a professional and extremely efficient way, e.g. ecommerce, hotel, restaurant, events, portfolio, community websites etc.

Simple CPT

Simple CPT provides an easy to use interface for registering and managing custom post types and custom taxonomies.

WP Duplicate posts pages & CPT vs Simple CPT