Universal, standards-based auth provider
PHP strong authentication library, web interface & CLI, OATH certified
Identity management and federations integration
A simple, personal OpenID provider written in PHP
Simple, unobtrusive authentication for Node.js
Web-based LDAP address book browser/editor
Apache LDAP Directory Manager
Two-factor authentication system
The Identity Manager provides a solution to manage the user life cycle
Username and password authentication strategy for Passport and Node.js
SSH Key Management solution
A class for PHP to talk to Active Directory through LDAP.
phpbb Multiple domain Single Sign on with wordpress plugin