Webly Wednesday: Online collaboration

This time, the theme of Webly Wednesday is online tools for doing collaborative writing.

• BabelStory
  Science fiction, fantasy, horror and mystery stories. Members can add 100 words to the end of a selected story.
• Chainbooks
  This site won’t launch until September, but apparently you can start a novel and let others continue it – or vice versa.
• Plotbot
  Free screenwriting software. Sign up and form a group with others to work on scripts together.
• Protagonize
  Create or continue stories and discuss writing with other members. I found this link (as well as the one for Chainbooks) on Maggie’s blog.

I’m not a member of all these, but they seem to be different and have some nice features, so if you’re looking for writing partners or collaboration groups, you may find something that suits your needs.

Do you know any collaboration sites? Please share them with us if you do.