The free open source forum software NodeBB is now working on official Fediverse support. Federation isn't ready yet, but if this interests you, you might want to follow their account:
Their official website is at https://nodebb.org and the co-founder of NodeBB is at @devnull
Thanks @feditips for the shout-out, and an enthusiastic welcome to all of our new followers! @devnull is working on our #ActivityPub support out in the open, and updates will come from this (nodebb) account.
We're excited for what the #fediverse represents, and can't wait to have our software (developed over a decade OUTSIDE of the fediverse) take its first baby steps into this new world