Gone - An ephemeral to-do list
Everyday - Take a photo of yourself everyday.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Habitify - The easiest way to keep track of your habits
Streaks - The to-do list that helps you form good habits.
Habit List - Create good habits and break bad ones with the app that keeps you focused.