MailStore - MailStore Home - A 100% free single-private-user desktop solution
EmailDoctor Office 365 Backup Tool - Backup & Save MS Office 365 account data in PST as well as EML file format
Gmvault - Backup the emails in your Gmail account.
MailsDaddy Office 365 Backup Tool - Office 365 Backup Tool to export PST from Office 365. Export Office 365 mailbox to PST securely and effortlessly.
Mail Backup X - Your one stop mail backup and archiving tool for Mac.
SysTools Office 365 Backup - Instantly backup your Office 365 Mailbox to PST / EML format with SysTools Office 365 Backup & Restore software for MAC and Win.