Documize - Enterprise-grade wiki and knowledge management platform

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

HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.

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.

ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.

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.