fosstodon.org is one of the many independent Mastodon servers you can use to participate in the fediverse.
Fosstodon is an invite only Mastodon instance that is open to those who are interested in technology; particularly free & open source software.
If you wish to join, contact us for an invite.
I'm gonna shutdown the ubuntu social instance for now, maybe forever. I'd recommend finding a new instance. 10 days notice. It goes down at the end of the month.
