yoob has pulled itself out of its "technology preview" stage, and is officially released as open-source software. More specifically, its source code is in the public domain and its development is hosted on a public repository on Bitbucket. Even though the source code is embarrasingly bad, I decided not to care. If you decide to care, you are quite free to hack it into better shape -- there are more than a dozen open issues in its issue tracker.
Check it out at http://catseye.tc/projects/yoob/