Campfire

“Slack is a lot more approachable than IRC, and a lot more scalable than Campfire, but has repeatedly made clear that they aren't interested in community users or moderation tools.”

“We use Campfire to keep up with each other during the day (my FuzzyClock says "join the campfire!" from 10-10:10 each morning, because I forget otherwise).”

“Within that, communication is key, so my fellow Gamasutra editors and I find Campfire to be invaluable for group chat and organizing - the comprehensive searchable logs are particularly useful.”