Habitica - Habitica is a free habit building and productivity application.
Grapefruit - An app for managing your mental health
Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.
Joy - Spend Happier & Build Your Savings
Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...
Calm - Calm.com can help you reduce stress and increase calm.