Google Calendar - Spend less time managing your day & more time enjoying it
Lightning Calendar - Organize your life — it’s about time!
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
iCal - In Calendar on your Mac, subscribe to calendars published or shared by others.
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.