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Stop Using Discord for Your Open source Communities | mattcen's mumblings
(blog.mattcen.com)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
Supposedly Revolt is FOSS and is similar to Discord. I haven't tried it yet, though.