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

Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...

Morgen.so - All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.

Calcurse - Calcurse is a calendar and scheduling application for the command line.

Notiv - Notiv is the intelligent meeting assistant that captures and automatically transcribes all your essential voice conversations into clever business outcomes.

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