We use the free version of Slack for chatting among team members and our invite-only community.

Who is invited?

Friendly collaborators, people who subscribe to Polygloss Unlimited, and other VIP players (active members of the community, provided lots of feedback, bug reports etc)

How is it organized?

It's not really 😂 At the moment the team has one private channel, all other channels are open. There are channels on a variety of topics, but the ones currently used are mainly #team, #general, and #ideas-and-feedback