VeriSign Personal Identity Provider.

Technorati is the recognized authority on what's going on in the world of weblogs. We help people search for, surface, and organize bloggers and their daily posts. You can claim your blog on technorati using OpenID.

claimID lets you track, verify, classify, annotate, prioritize and share the information that is about you online.

First standalone OpenID provider.  Full featured solutions for both individuals and businesses. 

lifestrea.ms is the first of a new breed called
Open Social Aggregator.
It keeps you in the loop with what's going on around you in almost realtime and keeps the world in the loop with what's going on with you.

To put it in prose: lifestrea.ms brings together all kinds of things that you and your social network create on the web in one place. There you decide who sees what.

You can share and re-publish your contents and even add additional texts and media from your lifestrea.ms dashboard.

To make sharing your life easier, lifestrea.ms breaks down your social life into seven of the most important parts: public, family, friends, local, professional, romantic and secret. You have one fully adjustable profile for each of your networks.

The same way you share your life with others, your network contacts share their life with you.

To keep you in the loop, you can even read your newsfeeds ('cause these are written by people you follow) and your emails ('cause these are people that contact you) from inside your dashboard.

Staying on top of what's going on has never been more effortless, so come and join today and start communicating with all your friends, family and colleagues in a new way.

Use your Google Login as an OpenID!

WordPress plugin to support OpenID authentication for commenting and user registration.

"Plaxo, Inc. keeps people connected by solving the common and frustrating problem of out-of-date contact information. [...] Plaxo is the universal digital assistant; available to you wherever and whenever you need it to keep you organized, on top of your life and in touch with those you care about." (http://www.plaxo.com/about) Sign Up/In via http://www.plaxo.com/openid

Ziki.com helps you control your online identity and offers everyone a new way to search, share, promote and monetize their content through social networks.

OpenID for comments on Blogger in Draft...