Zodor

Email All Users is a plugin that creates a widget that allows you to send mass email to all registered users in your wordpress site. 
You configure the widget with a title and mailto-link-title. 
The widget will then create a mailto:link that will include all users that is active. 
If you have the plugin “Email Users” installed it will only include users that has approved mass email in the settings.

Email All Users

Email All Users is a plugin that allows you to send mass email to all registered users in your wordpress site.

TIEro

A simple plugin to find files which are stored in the WP uploads folder (and sub-folders) but which have no corresponding entry in the Media Library.
The plugin creates a new unattached media record for each file, plus metadata where appropriate. You can then delete leftover files through the normal WordPress Media Library UI.

TIEmediahelper Media Library Tools

Find leftover files stored in the WP uploads directory tree which are missing from the Media Library.

Email All Users vs TIEmediahelper Media Library Tools