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.
Writefull - Writefull provides you with the tools you need to improve the quality and consistency of your writing.
A5 - Takes notes in your browser. Elegant & simple.
Trix - A rich text editor for everyday writing.
Knotable - Cut the noise out of busy email threads
Facebook Notes - Facebook launches a platform for writers and bloggers