The roots of Really Simple Plugins :)

Really Simple Plugins is a platform by the creators of Really Simple SSL

We like to build add-ons for our favourite plugins, like Easy Digital Downloads, Ultimate Member, and WP Job Manager. Starting with two add-ons for Ultimate Member, we’re planning to extend the number of add-ons continually.

Like with Really Simple SSL, the main focus of these plugins is the user: easy user interface, great support, quick install.