DebianDC is a Active Directory Domain Controller distribution
Self-hosted LDAP admin and Active Directory web console with REST API
Generate reports from Active Directory
Web-based LDAP address book browser/editor
An open source Identity & Access Management solution with AD-functions
The Identity Manager provides a solution to manage the user life cycle
LDAP passwd Enumerator for Puppet
Browse and edit LDAP-based directories / entries
A class for PHP to talk to Active Directory through LDAP.