myWriteClub is a new beta site which allows you to setup writing goals to track and share.
The C post for #26Tech A-Z Challenge will preview several apps which provide collaboration and file sharing capabilities for your creative work.
For those on twitter (ie. most of the world, and a few aliens and trolls too), you must have been privy to the daily or weekly newspapers coming out from hashtags and tweeps on twitter. These are produced by the free to use paper.li service.