Open Social is a Drupal based out of the box online community software, which is open source and free with commercial support if needed. This is how we like the software we use.
Resources
- https://www.drupal.org/open-social
- https://www.drupal.org/docs/8/distributions/open-social
- Case study of the green peace community site greenwire made with open social: https://www.drupal.com/case-study/greenpeace-greenwire