Purp - A smart to-do list and goal tracker app
XAgo - Keep track of repeated events in your life using this iOS and Android application
Nirow - Habit tracking: Automated, Siri-ed, Calendar-ed, and More!
Habitica - Habitica is a free habit building and productivity application.
Stratagem - Build your best life.
Flow Dashboard - Habit, task & goal tracking + quantified self