Way of Life - Habit tracking on iOS
HabitHub - HabitHub is a great mobile app that helps you to plan your daily schedule to organize your life.
Streaks - The to-do list that helps you form good habits.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
ProductiveApp.io - Productive is a habit tracking application.
Habitica - Habitica is a free habit building and productivity application.