Authentication for the Web
The authentication glue you need
Find that huge folder that you didn't know it was there
Web-based LDAP address book browser/editor
Zentyal is a Linux Small Business Server
Tomcat SPNEGO/Kerberos Authenticator and Active Directory Realm
Manage network users' information with Active Directory
A PHP web based password manager for SysAdmins
an extremely buggy web app !
NAS/File Sharing/PDC server in 5 Minutes
A class for PHP to talk to Active Directory through LDAP.
Linux Mail Server with Calendaring and IM
An easy-to-use, AD compatible Linux domain controller and file server
Alternative to windows!