The Webform Mass Email module has now been ported to Drupal 8.
The Entity Class Formatter is a nifty little Drupal 8 module which allows editors to place classes on to entities, allowing their look and feel to be altered in the theme layer.
The Enforce Profile Field is a new Drupal 8 module which allows editors to enforce the completion of one or more fields in order to access content on a site.
The Webform Invitation module has now been ported to Drupal 8.
The Entity Reference Display module allows editors of Drupal sites to select which view mode they would like to display a list of entities as.