Bobby Gunawan

A plugin which adds portfolio custom post type for WordPress themes <a href="https://made4wp.com" rel="nofollow ugc">by Made4WP</a>.
This plugin adds a custom post type “portfolio” and other portfolio related backend features like taxonomies and meta boxes.
This plugin DOES NOT add any front end display. You will need to add/edit your own “single-portfolio.php”, “archive-portfolio.php” or make a custom query for the post type “portfolio” to display the portfolio items.
Although this plugin is meant to be used with Made4WP themes, please feel free to use it for your own themes as well.
** UPDATE NOTICE ** 
The taxonomy “type” has been changed to “category”. If you had any portfolio items using the type taxonomy, you will need to recreate and switch them to use categories instead.

M4WP Portfolio

A Made4WP plugin. This plugin adds the custom post type "Portfolio" and it's related features such as taxonomies or meta boxes.

KrishaWeb

Dilip Bheda

Pratik Gandhi

Girish Panchal

This plugin gives flexibility to user to change posts from one post type to another. Also users can change posts from post type to page.
Features 
• Easy installation 
• Post to other post type or page. 
• Free support
Checkout the advanced features of Post Type Transfer: 
• It provides functionality enable/disable the feature for certain post type. 
• It also provides functionality to transfer the taxonomy while transferring the post to other post type. You can create new taxonomy or use the current one.
<a href="https://codecanyon.net/item/post-type-transfer-pro/21585540" rel="nofollow ugc">Get the Post Type Transfer Pro</a>
<h4>Supported Types</h4>
The plugin will help you to transfer any post’s post type to other post type. It will also allow custom post type. Invisible post types like revision, menu and attachment are purposely excluded

Post Type Transfer

Easy to use

A simple way to change a post's post-type in WordPress

M4WP Portfolio vs Post Type Transfer