Timebug - Productivity & life management app to guide self discovery
Streaks - The to-do list that helps you form good habits.
Habit Challenge - Habit Challenge is an elegant mobile app that helps you to create new daily routines and keep you on track.
Taskful - Deadlines, meet your match.
Youtine - Develop self-discipline, without using an app.
ToDoList - Windows desktop application to stay on top of your daily tasks.