MigrateEmails IMAP Backup Tool - MigrateEmails IMAP Backup Tool is an efficient tool to easily backup IMAP emails to PST, MBOX, Gmail, G Suite, etc
imapsync - Console-based utility for migrating IMAP mailboxes.
isync (mbsync) - mbsync is a command line application which synchronizes mailboxes.
OfflineIMAP - OfflineImap synchronizes email between an IMAP server and a MailDir or between two IMAP servers.
Softaken IMAP to IMAP Migration - Softaken IMAP to IMAP Migration allows transfer of emails from one IMAP Server to another. All IMAP Servers are compatible with this application. Users can easily migrate complete mailbox folders between IMAP Server accounts with attachments.
iSync - iSync is a software application published by Apple Inc.