Meetingbird - Powerful meeting scheduling and notes — right in your calendar

Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.

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

Google Calendar - Spend less time managing your day & more time enjoying it

Navigator - The Teamwork assistant — run great meetings without busywork

Itsycal - Itsycal for Mac. Itsycal is a tiny menu bar calendar. If you want, it will display your events as a companion to the Mac Calendar app. You can also create and delete (but not edit) events. Download Itsycal for macOS 10.