InstaCal

The missing menu bar calendar for MacOS

Apple Mail

There’s big news attached.

powerful calendar app for macOS

The smart menu bar calendar

Calendars 5 seamlessly syncs with local iOS calendars, Reminders and even Google Calendar.

Day-O is a simple menu bar clock replacement with a simple calendar for your Mac.

Material design open source calendar for Android.

The simple and connected calendar

Organize your life — it’s about time!

Smite procrastination. Plan, allocate, and track your time by making every task fit.

Plan is a better way to organize.

Rainlendar - Customizable desktop calendar

A simple calendar with events (optional recurring and reminders), week numbers and a customizable…

Calendar and scheduling for teams

Take control of your schedule and get reminded wherever and however you want.

An intelligent calendar

TAPIRapps. aCalendar and aCalendar+ for Android. The fastest Android calendar.

qOrganizer is a general organizer that includes a calendar with schedule,reminders,journal/notes…