Yesterday and today Frontier Developments ran a 24h fundraising livestream to get nerds to give money to the Special Effect charity instead. That worked out quite well as a total of £53,680 was raised, nicely overshooting the £25,000 target.
Special Effect makes hardware and software to allow people with disabilities to play videogames. This may seem like a futile goal, but remember that games are also a social activity these people were denied.
Octodon is a nice general purpose instance.