MailStore - MailStore Home - A 100% free single-private-user desktop solution
MigrateEmails IMAP Backup Tool - MigrateEmails IMAP Backup Tool is an efficient tool to easily backup IMAP emails to PST, MBOX, Gmail, G Suite, etc
MozBackup - Backup tool for Firefox and Thunderbird
MailsDaddy IMAP Backup Tool - All in one solution to take backup for all e-mail clients.
imapsync - Console-based utility for migrating IMAP mailboxes.
Softaken IMAP Mail Backup - Export IMAP Server emails to local PC smartly – Softaken IMAP Mail Backup