gyptazy.com 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.
I really like Simon Harrison's series of blog posts about using #GameOfTrees for simple version control tasks: https://simonh.uk/tags/got/index.html
My own use cases are more complicated than Simon's but it is making me happy to see confirmation of how the UI designed for working on #OpenBSD and related projects is working very well for people with fairly simple needs. That was one of my goals from the very beginning and is a significant differentiator from #Git.