st2i

WP OpenID Selector is the adaptation of openid-selector (http://code.google.com/p/openid-selector/) to wordpress.
Openid plugin (https://wordpress.org/extend/plugins/openid/) is needed to use wp-openid-selector.
Users who want’s to authenticate (register) on a wordpress blog with openid system, only need to click on the their logo’s provider, instead of writing it’s url, to be automaticaly redirected to their openid server and proceed to the authentication.
You can see the plugin in use on our web site (http://www.st2i.com) or on the stackoverflow web site.

WP OpenId Selector

Adaptation of OpenId Selector for wordpress

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

WP OpenId Selector vs Open ID Delegate