apache cookie SSO mechanism.
hook pam to authenticate users against anything
Apache LDAP Directory Manager
An open source Identity & Access Management solution with AD-functions
Tool to quickly set up an LDAP server
two factor authentication management system
NTLMv2 authentication library and filter for Java
Two-factor authentication system
Authentication, Access Control, and Single Sign-On
Open Source Web Single Sign-On
Proxy Manager that integrates AD with Squid using SSO
Single Sign On module for Apache and NGiNX
An open framework for Single SignOn authentication
Add LDAP user authentication in MySQL
LDAP backend for VirtualBox RDP Auth
Deprecated project - see http://wordpress.org/extend/plugins/wpmuldap/