Slacking off? It used to be there was pretty much one place to chat with your fellow developers: IRC

Reg tiptoes through the Zulip to review open source chat and collab software

Review  IRC is crusty, ancient, and still far and away the best group chat system currently available. IRC is the best chat system precisely because it is a system. It is a protocol, not just an app, and even better it is a loosely federated protocol.…

from The Register