CodingBunny

Duplicate page and post plugin provides functionality to create a clone of page or posts. You can duplicate pages, posts and custom post by single click and it will be saved as draft. 
Duplicate page and post doesn’t have a lot of features that other plugins have, but it also is lightning fast by comparison.
<h4>Major features of this plugin include</h4>
<ul>
<li>Create a clone of particular page.</li>
<li>Create a clone of particular post.</li>
<li>Create a clone of particular custom post(CPT).</li>
<li>Create a clone of particular menu.</li>
<li>Option to select Post/Page Elements to copy.</li>
<li>Option to add Title Prefix.</li>
<li>Option to add Title Suffix.</li>
<li>Option to select duplicate Post/Page Status.</li>
<li>Option to Redirect after click on Clone.</li>
<li>Option to select Allowed User Role Permission.</li>
<li>Option to select Allowed Post Type Permission.</li>
</ul>

CodingBunny Easy Duplicate Post

Clone WordPress page, post and custom post types.

liontude

Postmenu is the most advanced plugin to duplicate (clone) posts (of any type), pages, menus, menu links (items of menu) and taxonomies (e.g. categories, tags, all of them). However, the most amazing feature is the ability to link posts and menus with a click; you need to see this in action and you’ll love it.
Main features
<ul>
<li>Easily links posts and pages with menus</li>
<li>Advanced duplicate options (various settings)</li>
<li>Duplicate menus and menu links (items of menu)</li>
<li>Duplicate of taxonomies (categories, tags…)</li>
<li>Display options in the menu links (logged in users, logged out users, everyone or deactivate)</li>
<li>Full compatibility with WPML (The WordPress Multilingual Plugin)</li>
<li>In the setting of the plugin you can control where it is shown and who can use it, and many other features</li>
</ul>
There is nothing in the market like Postmenu. It is making our life easier and we want to share it with you. It is constantly developing and improving, please help us with your comments, suggestions, or reporting errors and problems, your words will always be welcome.
— 
by liontude

Postmenu

It's great, thanks so much. I can duplicate any post type and add to menu inside of post, page, so on.

I love it.

I waiting for many years some like this.

Duplicate (Clone) Posts, Pages, Menus, Menu links (Items of Menu) and Taxonomies. Easily add any Post or Page to the Menus, Display options in the men …

CodingBunny Easy Duplicate Post vs Postmenu