Trello for Slack - Organize anything with anyone, inside Slack
Chili Piper - Chili Piper is an intelligent calendar for Sales teams, to book their own meetings or set appointments for other teams.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Geekbot - Discover how to organise asynchronous stand up meetings in Slack and keep your team synced using Geekbot. Start your free trial today!
Halp - Slack-first ticketing for internal helpdesk
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.