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