Google Calendar - Spend less time managing your day & more time enjoying it
Habitica - Habitica is a free habit building and productivity application.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...
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.