D8 Domain Access - pierregermain/MyDrupal GitHub Wiki
Base Module:
https://www.drupal.org/project/domain
Other modules:
https://www.drupal.org/project/entity_domain_access (no)
https://www.drupal.org/project/domain_entity
https://www.drupal.org/project/domain_group
https://www.drupal.org/project/domain_site_settings
https://www.drupal.org/project/domain_theme_switch
https://www.drupal.org/project/domain_menus
https://www.drupal.org/project/domain_menu (no)
https://www.drupal.org/project/domain_menu_access (no)
https://www.drupal.org/documentation/modules/domain