Ron Rennick

Rolf Allard van Hagen

Adds a Theme Stats option to the super admin menu. The admin panel lists all the themes in use site-wide. At the top of the list will be the most popular theme and a number in brackets of how many are in use. Click on the name, and a drop-down list will appear of all blogs using that theme, with a link to each blog’s home and dashboard.
This plugin goes in the mu-plugins folder. This is an updated version of the theme stats (for subdomain installs) plugin we released in 2007. This version is designed for either subdomain or subdirectory installs.

Multisite Theme Statistics

Adds theme usage statistics within your network, shows themes by user and most popular themes.

Katherine Semel-Munson

As my WordPress network grew I found it challenging to track which plugins and themes were used on each site, and the only way to check was to visit each dashboard one at a time. What a hassle!
This plugin adds columns to your Network Admin on the Sites, Themes and Plugins pages to show which of your sites have each plugin and theme activated. Now you can easily determine which plugins and themes are used on your network sites and which can be safely removed.

Network Plugin Auditor

This is an indispensable tool for MS admins, since WordPress core doesn't include any tools for seeing which MS plugins are in use or by which sites.



Excellent tool

For multisite/network installations only.  Adds columns to your network admin to show which sites are using each plugin and theme.

Multisite Theme Statistics vs Network Plugin Auditor