mastodon.acc.sunet.se is run by the Academic Computer Club at Umeå University located in Umeå, Sweden. ACC is actively involved in several open source projects and we provide mirrors for Debian, Ubuntu, Gnome and GIMP. We also host servers for the Gimpnet, Freenode, and OFTC IRC networks. You can read more about our projects and our servers on the ACC website.
Mastodon is a social network based on open web protocols and free, open-source software. It is decentralized like e-mail.