1)   Inactive Users Tracker 1.0.03
Inactive Users Tracker automates the management of inactive user accounts. The program periodically checks user accounts in specified domains, reports to you, and automatically disables all accounts inactive for more than a specified number of days.

 2)   True Last Logon 2.5.1.1
Find the true last logon time for every user and computer account. Clean up your Active Directory by easily identifying unused or obsolete user and computer accounts by identifying their true last logon time and account status.