Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
metapad - Metapad is a small, fast (and completely free) text editor for Windows 9x/NT/XP/Vista with similar...
Nuclino - Nuclino works like a collective brain, helping teams bring all their knowledge, docs, and projects together in one place. It's a modern, simple, and blazingly fast way to collaborate.
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
FocusWriter - FocusWriter is a fullscreen, distraction-free word processor designed to immerse you as much as...
Walling - Walling is your visual space to capture ideas and organize projects.