NetWrix Auditor - Configuration Auditing of IT Infrastructure
imapsync - Console-based utility for migrating IMAP mailboxes.
ManageEngine ADAudit - ManageEngine ADAudit is a real-time windows active directory auditing tool.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
PingCastle - Because the Active Directory security lies in the process and not in expensive tools, our solution is simple: download PingCastle and apply its methodology.
audriga Email and Groupware migration - Easily migrate your email, contacts, calendar items and tasks to your new provider or server. No software installation is required.