Roy Tanck

<p>This plugin will help you:</p>
<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>
<p>This plugin currently does nothing on single-site WordPress installs.</p>


Network Admin Assistant

Helps you manage a WordPress network by displaying useful statistics.

Network Admin Assistant vs Multisite Toolbar Additions