Things - Things is an easy to use task manager.
Gone - An ephemeral to-do list
Amazing Marvin - Customizable personal productivity tool
Streaks - The to-do list that helps you form good habits.
Everlist Task Manager - Groceries, trips, errands, and daily todos managed simply. get your tasks under lovely control.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.