Thumbscribes is a website for collaborative writing. You can take a sneak peek without signing up.
Once you sign up with an e-mail address, you can read more, contribute to writing that’s already been started, or you can start your own “scribe”. To start your own, you’ll need to fill out the following information, including invitation e-mails to people you want to collaborate with, if you are making your scribe private. Private scribes can still be read by the community, but only you and the people you invite can add to or edit it.