Everyday - Take a photo of yourself everyday.
Habitify - The easiest way to keep track of your habits
Habit - Habit is a habit tracker application that allows users to keep track of the habits all day long and throughout the year.
Habit List - Create good habits and break bad ones with the app that keeps you focused.
Momentum - Agile goal and performance management
Rabbit Habit Tracker - A minimalistic habit tracker with a helpful widget set