Samba

[technet.microsoft.com] Interop: Authenticate Linux Clients with Active Directory

http://technet.microsoft.com/en-au/magazine/dd228986.aspx tehcnet article on providing authentication against AD using samba/winbind

[russian] adjustmentsoft:samba_pdc - debian по-русски

http://debian.telenet.ru/adjustmentsoft/samba_pdc short how-to about configuring AD PDC using debain+samba+ldap+kerberos

GPL Software from Internet Connection

http://gpl.internetconnection.net/ various tools under GPL license , interestining are:

низкая скорость работы samba на gigabit lan - Конференция iXBT.com

http://forum.ixbt.com/topic.cgi?id=76:7017#l Russian: speed up options to samba config (TCP related)