OpenID support for Ruby on Rails application

Question

What is current state of the art for enabling OpenID login in Ruby on Rails applications? This is a community wiki with up-to-date answers to this question.

Authlog

Answer 1

Check out this Railscast on OpenId for more info. I'm not sure if/how it might work alongside restful_authentication, but might be a good resource. (I haven't watched it yet)

Answer 2

The only gem I know of that supports OpenID Connect (the latest version) is:

https://github.com/nov/openid_connect

However, it has absolutely no documentation. :(