Kyber for Slack - All-in-one Slack app: tasks, standups, polls, surveys & more
Slack News Feed - Get the top posts from every Slack chat you're in.
Huminos - Free OKR and Growth acceleration platform for Startups
Slinky - Your slack links — organized!
Meetingbird - Powerful meeting scheduling and notes — right in your calendar
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.