manmachine.me is a Fediverse instance that uses the ActivityPub protocol. In other words, users at this host can communicate with people that use software like Mastodon, Pleroma, Friendica, etc. all around the world.
This server runs the snac software and there is no automatic sign-up process.
Regarding an OpenBSD package, I'm sure it would be very easy to do. OpenBSD for me is first class, and #snac works great there.