mywptrek

Subscribe your viewers to your calendar and inform them about your new events. 
Enable subscription to your events calendar. Inform your audience each time you create a new event.

Subscriber Addons for The Events Calendar

Subscriber Addons for The Events Calendar. Subscribe your viewers to your calendar and inform them about your new events through email.

enqtran

Send notification to admin when someone tracking website. When there are new articles will be sent an email to the email signed in tracking page.
Ask for the latest version of wp (minimum 4.3 ).
Requires PHP smallest is 5.2
You need to install SMTP for email admin you used to send mail
<h4>Support</h4>
<a href="https://enqtran.com" rel="nofollow ugc">FAQ</a>

Subscriber Addons for The Events Calendar vs Subscriber website