Streaks - The to-do list that helps you form good habits.
ProductiveApp.io - Productive is a habit tracking application.
Goal Meter - Goal Meter is an elegant mobile application that helps you to change your habits and maintain your focus at work to reach your goals.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Strides - Track all your goals & habits in one place, with flexible reminders to hold yourself...
Habitica - Habitica is a free habit building and productivity application.