[hackety-hack.com][hh.com] is the web backend powering the collaborative features of [Hackety Hack][hh]. It is written in Rails 3 and continues to be under active development (see 'Helping Out'), the switch to Rails 3 happened quite recently so there's still lots to be done.

If you have any experience writing Rails apps, feel free to help out, we're open to pull requests as long as you follow a few conditions.