I see GitHub OAuth logins in some programmer-centric websites. I prefer that over Google login (and god forbid Facebook). It's just as bad from a login-centralization perspective, but GitHub allows you to control your identity freely, instead of mandating (and more-or-less enforcing) your legal name like Facebook.

(Google no longer rejects or bans you for fake-sounding names, ever since the Google+ controversy, but it still enforces a Western-style first/last name instead of other cultures' name formats or single-part usernames.)