Dune Awakening. Not the best game in the world, but I have a group of friends and it’s fun to hang out and try to survive the desert together.

Does zsh count?

xmpp is closer to IRC than to modern communications protocols. End-to-end encryption, for example, is an optional protocol extension, which hasn’t even been formally finalized yet (and probably won’t ever be, given it’s been 10 years now)