Elm has been very successful at encouraging adoption of late. Here is what their Community page looks like:

http://elm-lang.org/community

On Sat, Jul 9, 2016 at 8:13 AM, Dean Thompson <deansherthompson@gmail.com> wrote:
On Jul 9, 2016, at 9:51 AM, Gabriel Scherer <gabriel.scherer@gmail.com> wrote:

In general I support the idea of "meeting the users where they are" even when that mean displeasing technological choices; this is why I have been active answering OCaml questions on StackOverflow in the past. I would be interested in making experiments with either:

- Discourse: I also heard bad things about it, but it's shiny, reactive and open source

- Mattermost, as an open-source alternative to Slack -- but we would need to find someone willing to host an instance.

Mattermost is very appealing, but seems strongly focused on team/enterprise communication rather than public venues.

But there’s a rather funny punchline: On www.mattermost.org, they have a Community menu, which has a Community Forums item, which links to … wait for it! … a Discourse forum (forum.mattermost.org).

Dean