An open-source forum engine, with an Elixir+Phoenix backend and an Elm frontend.
This is the Firestorm Forum project. It's presently at version 0.10, nearly ready for a 1.0 release. You can view the running forum at http://forum.firestormforum.org.
This project was funded by a Kickstarter.
All of the patrons that made it possible are listed in the PATRONS file.
Firestorm is MIT Licensed.