MailStore - MailStore Home - A 100% free single-private-user desktop solution
SolarWinds Backup - Modern server backup software
MozBackup - Backup tool for Firefox and Thunderbird
Zerto - Virtual replication & recovery solution
imapsync - Console-based utility for migrating IMAP mailboxes.
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.