Go Fucking Do It - Set a deadline and a price. If you fail, you pay.
Habit List - Create good habits and break bad ones with the app that keeps you focused.
Task Fighter - The beat`em up calendar/todolist
Momentum - Agile goal and performance management
Publicly - Build in the open
everyday.app - Every day, it gets a little easier. But you gotta do it every day, that's the hard part.