Alex Furr

simon.ward

The Multisite Auditor gives details on which sites are using which themes and which plugins. This plugin is optimised and designed for large multisite installations that have more than 1000 sites. However, it will also work very well with smaller networks.
Features
<ul>
<li>Displays data and stats for each any every theme and plugin</li>
<li>Shows theme use across the entire network</li>
<li>Shows plugin use across the entire network</li>
<li>Quickly view the most popular themes and most activated plugins</li>
<li>Shows themes that no longer exist – i.e. broken sites</li>
<li>Easily bulk switch sites using one theme from another</li>
<li>Uses jQuery datatables for much easier sorting / searching that the standard WP tables</li>
<li>Audit your site once – data is kept to date automatically</li>
</ul>

Multisite Auditor

The only plugin that can properly audit your themes and plugins for LARGE multisite installations (1000+ sites)

Rakib Hossain

Site Update Notification is a simple WordPress plugin that sends email notifications to administrators when plugins, themes, or WordPress need updates.
This plugin checks for available updates for plugins, themes, and WordPress core every day and sends an email notification with the list of updates that need to be installed.
<h3>Features</h3>
<ul>
<li>Sends email notifications for plugin updates</li>
<li>Sends email notifications for theme updates</li>
<li>Sends email notifications for WordPress core updates</li>
<li>Customizable email address</li>
<li>Easy-to-use and lightweight</li>
</ul>

Site Update Notification

A plugin that sends email notifications when plugins, themes, or WordPress need updates.

Multisite Auditor vs Site Update Notification