Habitica - Habitica is a free habit building and productivity application.
Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.
Beeminder - Beeminder
SuperBetter - Empower youth mental health through schools and sports
Joes Goals - Joe's Goals is an online goal-tracking website. 100% Free. No Download Required.