title: What websites allow users to login with an arbitrary OpenID Connect identity?
body: <p>I'm building an OpenID Connect Provider (OP) but so far I haven't found any public websites on which to try it out. I had intended on adding it to my StackOverflow profile only to find out that poor ol' SO uses an <a href="http://dotnetopenauth.net/" rel="nofollow noreferrer">obsolete library</a> (<a href="https://github.com/DotNetOpenAuth/DotNetOpenAuth/issues/392" rel="nofollow noreferrer">the repo is dead</a>) that only supports OpenID 1.1 and 2.0 but not OpenID Connect! And <a href="http://openid.net/" rel="nofollow noreferrer">http://openid.net/</a> does not appear to have a list of any such sites with the exception of its own <a href="http://openid.net/certification/testing/" rel="nofollow noreferrer">conformance testing</a>.</p>
  
  <p>Any thoughts, references, or answers as to where one can go to play with my OP?</p>
  
  <p><strong>UPDATE</strong>: I'll try to be more specific. I'm looking for websites like StackOverflow or LiveJournal which allow you to login with any OpenID. I have yet to find a public client that does this with the exception of OpenID.net's conformance testing. An ideal client would implement discovery to translate the identity string into a WebFinger call, get the provider metadata, dynamically register with the provider, and finally perform the authentication.</p>