hook pam to authenticate users against anything
Apache LDAP Directory Manager
Facebook authentication strategy for Passport and Node.js.
JNDI DirContext source builder utility
An open source Identity & Access Management solution with AD-functions
Central Authentication Service (CAS)
Mature LDAP, LDIF and DSML client with i18n support.
Active Directory Keytab Management
Token based authentication module for angular.js
Tool to quickly set up an LDAP server
PHP User Login and Management System based on Codeigniter
SAAAD - Gerenciar o Samba4 como AD
An extensible authentication and authorization library for Clojure
Two-factor authentication for Node.js
DBIS Reference Implementation