nuBuilder Forte is a cloud database builder.
A simple, personal OpenID provider written in PHP
FIDO® Certified StrongKey FIDO Server (SKFS)
PHP strong authentication library, web interface & CLI, OATH certified
Web-based LDAP address book browser/editor
apache cookie SSO mechanism.
PHP User Login and Management System based on Codeigniter
A simple PHP library for LDAP authentication
Two-factor authentication system
SSH Key Management solution
A LDAP User Management System
A class for PHP to talk to Active Directory through LDAP.
phpbb Multiple domain Single Sign on with wordpress plugin
Deprecated project - see http://wordpress.org/extend/plugins/wpmuldap/