Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
When2Meet - When2meet helps you find the best time for a group to get together. It is a free survey tool that is quick and easy to use.
Calendars 5 - Calendars 5 seamlessly syncs with local iOS calendars, Reminders and even Google Calendar.
x.ai - x.ai is a tool to schedule meetings for you and your team.
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.
WhenAvailable - WhenAvailable is an excellent event management tool that allows scheduling the dinner party, book club meeting, and guys’ night out with simple and best ideas.