Gone - An ephemeral to-do list
ProductiveApp.io - Productive is a habit tracking application.
Streaks - The to-do list that helps you form good habits.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Strides - Track all your goals & habits in one place, with flexible reminders to hold yourself...
Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.