List of non-Google sites which accept a Google account?

Like the Stack Exchange network of sites: How many other sites accept a Google account?

I feel very comfortable to remember only one ID/password for all the systems.

From web app Antoops

• Since Google is now an OpenID provider, I'd say at least all the sites that accept OpenID login.

  Otherwise, Google also uses OAuth, which means that you authorize the other website/webapp to access your data in your google profile.

  As to how many websites provide either one or the other, I'm sorry, but I can't even give you a ballpark estimate...

  From jfoucher

• Google is an OpenID account provider so all sites accepting OpenID accounts will accept Google accounts.

  Here's a list (which might not be complete).

  Antoops : thanks Crossbrowser!!
  From GoodEnough