A Java-based LDAP API
A simple, personal OpenID provider written in PHP
PHP strong authentication library, web interface & CLI, OATH certified
Identity management and federations integration
Web-based LDAP address book browser/editor
Tomcat SPNEGO/Kerberos Authenticator and Active Directory Realm
JNDI DirContext source builder utility
Mature LDAP, LDIF and DSML client with i18n support.
Access Management and Single Signon platform
A simple PHP library for LDAP authentication
NTLMv2 authentication library and filter for Java
Two-factor authentication system
The Identity Manager provides a solution to manage the user life cycle
SSH Key Management solution
A class for PHP to talk to Active Directory through LDAP.
phpbb Multiple domain Single Sign on with wordpress plugin