Habits by Reclaim.ai - Auto-block time on your calendar for all your routines
Social Pomodoro - Meet an accountability buddy for 25 minutes of focused work.
2 Minute Habits - Productivity app helps overcome procrastination in 2 minutes
Habit List - Create good habits and break bad ones with the app that keeps you focused.
Publicly - Build in the open
Habitica - Habitica is a free habit building and productivity application.