myPoli - Gameified to-do list and habit tracker.
GoalsWon - Human accountability coaching for busy people
Habitica - Habitica is a free habit building and productivity application.
Beeminder - Beeminder
SuperBetter - Empower youth mental health through schools and sports
Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.