Excelent tip Sarah!

Thanks Kailey for such nice plugin.

Katherine Semel-Munson has developed another useful plugin for multisites: https://wordpress.org/plugins/network-plugin-auditor/

"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."

This is also available at GitHub: https://github.com/ksemel/network-plugin-auditor

Cheers,
Gabriel