Fosscord is still a work in progress. If you're an advanced user, read the Documentation for a guide on how to get started.

Community Instances:

fosscord.com
The offical Fosscord instance
Fosscord Staging
Official testing instance
TheArcaneBrony
Instance of TheArcaneBrony
Freecord
24/7 Maintained instance! Friendly user base and a chill place for communities to hangout!
MaddyUnderStars' development instance. 24/7 uptime, data persistence, with many new and not yet merged features.
Add your own Instance