Mailtrim - Email lives forever!. Reinvigorate your emailing experience with the best free email client, the Mailtrim
imapsync - Console-based utility for migrating IMAP mailboxes.
Loop Email - Emailing for teams: Organize your Inbox into channels 💌
Gmvault - Backup the emails in your Gmail account.
Missive - Team communication app now supporting FB, Twitter & SMS
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.