Zentyal is a Linux Small Business Server
Single Sign On Server for Windows
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
Token based authentication module for angular.js
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