bmsterling

This plugin adds a button to the widget’s admin page that will delete all inactive widgets.

Remove Inactive Widgets

This plugin adds a button to the widget's admin page that will delete all inactive widgets.

ericjuden

Changes visibility of a blog after it has had no activity for a specified amount of time. It is only for WordPress Multisite. This is meant for people running networks of blogs and hide the inactive sites.
This plugin uses WP_Cron to update the sites. I’ve created a filter in the plugin to edit the query of sites that are returned. There are also hooks for adding additional custom options to each of the settings.

Hide Inactive Sites

Changes visibility of a blog after it has had no activity for a specified amount of time. It is only for WordPress Multisite.

Remove Inactive Widgets vs Hide Inactive Sites