Simply notifies registered users if a new post has been published. If you use the User-Access-Manager (UAM) Plugin by GM_Alex, users will only be notified if they have access to the post. Notifies the admin if a user changes his subscription status. There is zero configuration. Available in English, German, French and Japan.
The subscription to new posts is activated to new users by default. Based on the post category, users are able to choose which notifications they would like to receive. They can also deactivate all notifications.