Habitica - Habitica is a free habit building and productivity application.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
Loop Habit Tracker - Loop Habit Tracker (AKA uhabits) helps to create and maintain good habits in order to achieve their...
BioBase - Measure and manage your stress
Flow Dashboard - Habit, task & goal tracking + quantified self
Time 2 - Stay focused and crush procrastination