Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.

Geekbot - Discover how to organise asynchronous stand up meetings in Slack and keep your team synced using Geekbot. Start your free trial today!

Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.

Chili Piper - Chili Piper is an intelligent calendar for Sales teams, to book their own meetings or set appointments for other teams.

SavvyCal - A scheduling tool both the sender and the recipient will love.

Standuply - Run daily standup meetings and track your metrics in Slack