Matthias Pfefferle

Will Norris

OpenID is an <a href="http://openid.net/" rel="nofollow ugc">open standard</a> that allows users to authenticate to websites without having to create a new password. This plugin allows users to login to their local WordPress account using an OpenID, as well as enabling commenters to leave authenticated comments with OpenID. The plugin also includes an OpenID provider, enabling users to login to OpenID-enabled sites using their own personal WordPress account. <a href="https://wordpress.org/plugins/xrds-simple/" rel="ugc">XRDS-Simple</a> is required for the OpenID Provider and some features of the OpenID Consumer.
Developer documentation, which includes all of the public methods and hooks for integrating with and extending the plugin, can be found <a href="http://wiki.diso-project.org/wordpress-openid-api" rel="nofollow ugc">here</a>.

OpenID

Allows WordPress to provide and consumer OpenIDs for authentication of users and comments.

Antonio Campos

This plugins had the needed code to the header of your blog, to detect your OpenID account at http://openid.sapo.pt. Configure your person name at the administration panel. Look at my blog source code and check the header (http://antoniocampos.no-ip.com).

Sapo OpenID Header

This plugins had the needed code to the header of your blog, to detect your OpenID account at http://openid.sapo.pt.

OpenID vs Sapo OpenID Header