Quill is a free, open source WYSIWYG editor built for the modern web. Completely customize it for any need with its modular architecture and expressive API.

Notion is an all-in-one workspace where you can write, plan, collaborate and get organized - it allows you to take notes, add tasks, manage projects & more. Imagine a lego structure. Notion provides the building blocks and you can create your own layouts and toolkit to get work done.

GitBook began in mid-2014 as an open-source tool for developers to build documentation. Today we empower teams of all sizes to share knowledge and build great internal & external docs.

NimbleNotes is an online note-taking and study platform. One-click study guides and flashcards, advanced search and filter, and realtime collaboration.