Please don’t use Slack for FOSS projects https://drewdevault.com/2015/11/01/Please-stop-using-slack.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+feedsapi%2FBwPx+%28Hacker+News+Top+20+Full+feeds+by+FeedsAPI%29
The top four Internet Relay Chat clients | Opensource.com
In this article, explore the many open source options for connecting to IRC and find the one that works best for you.
Source: The top four Internet Relay Chat clients | Opensource.com
Of particular interest is Kiwi IRC, web based client that is powered by node.js and provides embeddable widgets so you can add chat to your website.