NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.
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.
JustNotepad.com - A free online notepad allows you to create any text or notes in your web browser.
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.
PlicPad - Shareable notepad without urls
Workflowy - A better way to organize your mind.