Authentication, Access Control, and Single Sign-On
The Identity Manager provides a solution to manage the user life cycle
Username and password authentication strategy for Passport and Node.js
Open Source Web Single Sign-On
Proxy Manager that integrates AD with Squid using SSO
SSH Key Management solution
A LDAP User Management System
Single Sign On module for Apache and NGiNX
A class for PHP to talk to Active Directory through LDAP.
phpbb Multiple domain Single Sign on with wordpress plugin