A test consumer as an HTTP server. Supports simple registration requests. Written in Python using the Janrain library.

An awesome hosted e-commerce platform written in Ruby on Rails.  They support OpenIDs for all authentication.

StartSSL™ uses client-side SSL certificates and SSL/TLS encryption exclusively to secure your account and to protect your private information! This authentication service provides you with the highest industry standard based on public-key encryption. Free of charge!

Jumbodir is an online storage service that allows free file uploads of up to 2 Gigabytes (or even more) for all OpenID users.
No upload/download bandwidth limitation

OpenID proxy for facebook, flickr, livedoor, hatena, and jugem.

Identity provider using browser SSL certificates. No passwords, no phishing. Only industry-standard certificate authorities; no self-signed certs or other silliness. Operates well with any OpenID relying party, Identity is http://certifi.ca/username.

prooveme.com is an SSL'd OpenID provider. We give you a client certificate, you can use OpenID without having to enter a username and password. It;'s very, very, secure.

We are offering an OpenID Provider (OP) as a Free Software with LDAP support as a backend. LDAP stands for Lightweight Directory Access Protocol - Internet protocol that email and other programs use to look up information from a server. It means our Identity Provider will be multi-user and could be easily integrated into solutions based on LDAP SSO (Single sign-on). The current development version works fine with both OpenLDAP and Microsoft Server 2003 Active Directory.

A fully-integrated OpenID consumer solution for the popular phpBB bulletin board software package. Simple Registration support.

Now available for free download.

Daily highlights of the new submissions to The OpenID Directory.