I use rcirc [1] on Gentoo from exwm [2]. I frequent freenode, oftc [3]. Honestly, I love irc. Also, exwm changed how I work in a very positive way. Next, I want to try the Next browser written in Lisp [4]. Although I have never used it, I know of people that use Bitl Bee [5] to interface with slack from emacs irc clients.

[1]https://en.m.wikipedia.org/wiki/Rcirc

[2]https://github.com/ch11ng/exwm

[3]https://www.oftc.net/

[4]https://next.atlas.engineer/

[5]https://www.emacswiki.org/emacs/BitlBee