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.
Gmvault - Backup the emails in your Gmail account.
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.
Cryoserver - Cryoserver is an all-in-one email archiving solution that empowers you to preserve your email in a tamper-evident archive, making you transform your data into a useful archive for everyday use.