Softaken Yahoo Backup - Softaken Yahoo Backup Tool to export emails of Yahoo Mail to PST, EML, & MBOX
imapsync - Console-based utility for migrating IMAP mailboxes.
ShDataRescue Hotmail backup Tool - Smart Hotmail Backup utility to save & download Hotmail mailbox emails to desktop. Hotmail email backup tool allows you to backup Hotmail items to PST, MBOX, Gmail, PDF, Yahoo, etc.
Gmvault - Backup the emails in your Gmail account.
MigrateCloudData Yahoo Backup Tool - Yahoo Backup Tool allow users to backup and download Yahoo emails to hard drive into various file formats and popular email clients along with attachments.
Cryoserver - Cryoserver is an all-in-one email archiving solution that empowers you to preserve your email in a tamper-evident archive, making you transform your data into a useful archive for everyday use.