Similar to the feature in the front-end member's section. I'm creating a membership system for a couple of Clubs I'm in, but the front-end membership component isn't suitable. it will be fine for administrators, but not to store rank and file records.
I'm currently using Pommo to send emails but it's a pain having to update two databases or do CSV transfers.
This could be an extension, one of many you could develop over time to extend the use of AppGini and increase its popularity.