Marcus Downing

Sometimes you want the different sites on a multisite network to share their taxonomies. 
This plugin forces a child site to use its parent’s taxonomies instead of its own.

MU Central Taxonomies

On a multisite network, this makes a child site use the main site's categories and taxonomies instead of its own.

KrishaWeb

Girish Panchal

Dilip Bheda

Pratik Gandhi

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

MU Central Taxonomies vs Post Type Transfer