There is Facebook Zero[1]; I believe that it is (to some degree) the inspiration for the Wikipedia Zero project.
An article[2] about it was submitted to HN a little while ago, and it argued that Facebook Zero is an attempt get people to think that "internet" and "Facebook" are synonyms.
[2]: Possibly: http://qz.com/5180/facebooks-plan-to-find-its-next-billion-u... It's not loading for me so I can't be sure, but it is in my browser history.