So today I bumped into https://mattermost.eclipse.org
This is like slack (sort of modern IRC) but open source.
I also found that is has a Linux Native client:
To get it to work, I just downloaded it, extracted it and ran the included “Mattermost” binary.
Connecting it to Eclipse was mildly counter intuitive.
When faced witht he ‘Teams’ dialogue, I thought I had to type in Name OR URL, but it turns out you type in both. The name is just an alias ex “Eclipse”, and for URL you put in:
After you joined, you can find some channels to join. In my case:
Now when someone wants to chat with you, you can give them the URL: