LDAP tools to support formerly NIS environments.
X display management and authentication application
Apache LDAP Directory Manager
DBIS Reference Implementation
gnupasswd - gnu change user password
Plugin for OpenLDAP who checks password quality
Project moved to github: https://github.com/pam-pgsql/pam-pgsql
Two-factor authentication system
Authentication, Access Control, and Single Sign-On
pGina is an open source replacement authentication system for Windows