Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...

Habitica - Habitica is a free habit building and productivity application.

Habit - Habit is a habit tracker application that allows users to keep track of the habits all day long and throughout the year.

LifeRPG - Automatically prioritize your goals and gain XP for achieving them. Features:

Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.

Motivate - Handpicked motivational videos updated daily