alexisabarca

With this very simple plugin you can use the blog URL to authenticate with OpenID using an another OpenID provider. 
called Delegation.
In order to maximize performance the vars are contained in plugin file rather than storing in a database.
Due to security issue (https://wordpress.org/news/2011/06/passwords-reset/) php file is gpg signed, ID 7ED1BC0C.

Open ID Delegate

This plugin adds the necessary tags to be able to use your blog URL as OpenID address using another OpenID provider

Rodrigo Primo

A simple plugin that adds the required meta tags to allow you to use your blog URL as your OpenID identifier with the provider you choose.
This plugins does not allow you to use your WordPress installation as a OpenID consumer or provider.
It was built based on MyOpenID Delegation plugin (https://github.com/benatkin/wordpress-myopenid-delegation).

OpenID Delegation

A simple plugin that adds the required meta tags to allow you to use your blog URL as your OpenID identifier with the provider you choose.

Open ID Delegate vs OpenID Delegation