Apple iWork - iWork is an office suite by Apple.
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.
OnlyOffice Docs - OnlyOffice Docs is an effective document creation and editing platform that provides you the options to create any kind of document with the collaboration of your team from any remote location.
Ghostnote - Add notes to anything.
Airborn - Create and edit documents online without sacrificing your privacy
Workflowy - A better way to organize your mind.