Jota Text Editor - Jota, pronouced as "i-o-ta", is a text editor designed for a long text file.
Nebulous Notes - Nebulous Notes is a powerful, yet simple, text editor for note-takers, writers, and coders.
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.
TextDrop - TextDrop is the fastest way to edit text files in your Dropbox using a web browser.
JS Bin - Sample of the bin:
Codeanywhere - Codeanywhere is a complete toolset for web development. Enabling you to edit, collaborate and run your projects from any device.