NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.
notepad.pw - notepad.pw is a online notepad which allows you to save your text in the cloud with features like
TakeNote - A web-based note-taking app with GitHub sync and Markdown support.
WriteXO - A cloud based notepad made for writers by writers.
Speechy - Speechy is an app by Twelve Stars Software that comes up with features to help you in reading text in a variety of different formats such as pdf, txt, EPUB, webpages, and many others.
Edit Pad - Fast, web-based plain text editor for quickly taking notes online.