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

Better Notes - Simple notes app that ties notes together with #hashtags

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.

Paper - Super-clean writing space with a lot of configurability that stays out of sight when you don’t need it.

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.

Workflowy - A better way to organize your mind.