Baremetrics for Slack - Subscription analytics, insights & notifications in Slack
Slack News Feed - Get the top posts from every Slack chat you're in.
Statsbot - Connect your database, let Statsbot generate data relationships from your database automatically, and get your first insights in a matter of minutes.
Slinky - Your slack links — organized!
June for Slack - Instant analytics, right in Slack
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.