MailStore - MailStore Home - A 100% free single-private-user desktop solution
Vaultastic - Vaultastic’s on-demand SaaS platform provides Protection, Visibility & Control for your Critical Business Data with Agile Cloud Archival.
imapsync - Console-based utility for migrating IMAP mailboxes.
MailArchiva - MailArchiva is an email archiving, email compliance, and e-Discovery enterprise server.
MozBackup - Backup tool for Firefox and Thunderbird
Authority - Authority is a straightforward and affordable email migration solution that allows you to move from your current email platform to new platform without using Authority as you archive.