Software available as a more-or-less turnkey service (hosting, maintenance, support and/or ongoing improvements provided). Software as a Service, or SaaS.
Monitoring and troubleshooting software and service.
Discourse bills itself as "The online home for your community: We make it easy to connect and collaborate anytime, anywhere"
Drupal-based "digital spaces that empower your members to connect, share knowledge and spread their ideas."
Running software on someone else's computer is not the full control that we deserve of anything important to our lives, but having this software be free to potentially run on our own (or somewhere else) is orders of magnitude better than not.