Roy Tanck

This plugin will help you:
<ol>
<li>Find plugins and themes that are not active on any blog.</li>
<li>Determine the impact in case a theme/plugin needs to be upgraded, removed or reconfigured.</li>
<li>See if a widget is in use on any blogs, and track down where.</li>
<li>Find users who do not have a role on any site (and are not network administrators).</li>
</ol>
This plugin currently does nothing on single-site WordPress installs.

Network Admin Assistant

Helps you manage a WordPress network by displaying useful statistics.

John James Jacoby

Felix Arntz

Ryan McCue

Jonny Harris

Turn your WordPress Multisite installation into many multisite networks, surrounding one global set of users.
<ul>
<li>Reveals hidden WordPress Multisite functionality.</li>
<li>Includes a “Networks” top-level Network-Admin menu.</li>
<li>Includes a List Table for viewing available networks.</li>
<li>Allows moving subsites between networks.</li>
<li>Allows global administrators to create new networks with their own sites and domain arrangements.</li>
<li>Group sites into logical networks using nearly any combination of domain (example.org) and path (/site/).</li>
</ul>

WP Multi Network

Thanks for keeping this plugin updated to work with the latest versions of WordPress. The plugin continues to work great. Much appreciated!

Latest Update

Considering to move all my small WP installation to multinetwork 

amazing plugin!

This has enabled me to use two separate domains in a multi-site for testing before roll-out to production.

Use this for staging


I just started playing with Multi Networks and having all my projects (subfolders and different domains together) is just brilliant. 


Nice!

Turn your WordPress Multisite installation into many multisite networks, surrounding one global set of users.

Network Admin Assistant vs WP Multi Network