I am one of the admins of the community and recently we added a Mattermost chat to our open-source game development services: https://chat.freegamedev.net (also see our new Gitea source repository https://git.freegamedev.net).
The nice thing about Mattermost (besides great developer integrations with github/gitlab etc. similar to Slack) is that it allows team servers for aggregating channels similar to Discord. Thus I am currently thinking about starting one for Quake1 development.
In tandem we run a service that can bridge chats between IRC, Discord, Matrix, Slack etc.
Thus I was wondering about some feedback from this community about the general interest and what channels to add. Primarily I am looking for existing channels on Freenode or Discord etc. that we can bridge to and thus have a aggregate space for all these Quake related development communities.
So for example we could create a Mattermost channel for FreeCS and bridge it to #freecs on Freenode IRC. And if there is a community around FreeCS on Discord for example, we could link it up as well into the same chat. But for Discord we need the help of a moderator from the channel to allow adding the bridge bot.
Looking forward to your feedback.
P.S.: for the IRC oldtimers: I am planning to also run MatterIRCd, which allows Mattermost to function similar to a IRC server with bouncer and thus you will be able to connect with any IRC client. And there is also the great Matterhorn terminal client
