JiJiTechnologies announces a free tool Active Directory Cleaner, which helps you to maintain your AD clean and secure. With AD Cleaner you can view the list of inactive users, disabled users, locked out users, inactive computers and disabled computers. You can delete, disable, enable or unlock the accounts in bulk.

Download here: http://www.jijitechnologies.com/product/adcleaner/ActiveDirectoryCleaner.html

Other products from JiJiTechnologies:
http://www.jijitechnologies.com/MassDeployer.html
http://www.jijitechnologies.com/product/passwordreset/PasswordReset.html

Raghuramji
JiJiTechnologies Team,
http://www.jijitechnologies.com