PHP strong authentication library, web interface & CLI, OATH certified
Identity management and federations integration
Apache LDAP Directory Manager
two factor authentication management system
NTLMv2 authentication library and filter for Java
Two-factor authentication system
The Identity Manager provides a solution to manage the user life cycle
Authentication, Access Control, and Single Sign-On
Open Source Web Single Sign-On
Proxy Manager that integrates AD with Squid using SSO