Group

module_name
group
Description

Alternative to the Organic Groups module. Allows you to create groups - e.g. classes, subscriptions, multiple communities.  Drupal module of the week post. Blog post.  It is by all accounts solidly written, but I found the initial UI confusing (in a "so what do I do now?" way) - you probably need to watch the YouTube video to understand it.

Tested by me
No
Drupal 8 support
Yes