There are some Matrix gateways to Freenode, but I haven't tried any.
> I was looking at this for something else, and thought this might be nice
> for PLUG.
> https://slack.com/help/articles/204368833-Slack-for-Nonprofits >
> I use Slack chat a lot with various customers and partners, and it's free
> to nonprofits ala PLUG (I think) if under 250 users. Not sure how many
> folks are actually joined to PLUG offer that to everyone (that would
> actually participate), but I'd be interested in joining it if one existed
> with the folks that normally participated here.