Not content with a legacy git-review, Google developed another Gerrit front-end, the git-coderevew. They use it for contributions to Go. I have to admit, that was a bit less of a special move than Facebook's git-review that uses the same name but does something entirely different.
P.S. There used to be a post about creating a truly distributed github, which used blockchain in order to vote on globally unique names. Can't find a link though.