Slack is a chat tool designed for teams to collaborate on projects. It features many advanced features over traditional IRC such as the ability to notify users by mentioning their @username and features around notifications and linking. It has a web based and desktop client so one can automatically join the channel more often.
- wiki.lesswrong.com/wiki/Less_Wrong_Slack - Transhumanists might be interested in the Less Wrong Slack network. Requires invitation
- agi-ai.slack.com - AI chat, requires invitation