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.

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.

OpenID vs OpenID Delegation