imapsync - Console-based utility for migrating IMAP mailboxes.
MigrateEmails IMAP Backup Tool - MigrateEmails IMAP Backup Tool is an efficient tool to easily backup IMAP emails to PST, MBOX, Gmail, G Suite, etc
isync (mbsync) - mbsync is a command line application which synchronizes mailboxes.
MigrateCloudData IMAP Mail Backup Tool - A trusted software with better designs and functions to perform the backup and migration of IMAP emails.
Corbett IMAP Mail Migration Tool - Easily Migrate IMAP Account Emails to Multiple Platforms
MCT IMAP Migration Tool - IMAP Migration Tool is the top-notch utility to backup and migrates the IMAP emails.