Things - Things is an easy to use task manager.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

BallerTODO - Ditch the list! Organize like a baller, get stuff done.

Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.

Streaks - The to-do list that helps you form good habits.