I just love. It's easy to use and share
TakeNote - A web-based note-taking app with GitHub sync and Markdown support.
OnlineNotepad.org - Free browser-based text editor
PlicPad - Shareable notepad without urls
HTML-Notepad - HTML WYSIWYG editor for structured documents
NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.
Secure Notepad - Secure Notepad is a note-keeping app that saves all your sensitive documents in an encrypted form.