I just love. It's easy to use and share
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.
OnlineNotepad.org - Free browser-based text editor
KeepNote - KeepNote: note-taking and organization.
Shrib - Take notes online. 'Free and no login' or 'AI assistant, visitor stats, privacy and productivity': super simple, with publishing and markdown, share to all devices.
MindForger - Thinking notebook and Markdown IDE web site home page
HTML-Notepad - HTML WYSIWYG editor for structured documents