MailStore - MailStore Home - A 100% free single-private-user desktop solution
Gmvault - Backup the emails in your Gmail account.
PST to Office 365 Wizard - Outlook PST to Office 365 files converter tool supports multiple formats conversion.
Mail Backup X - Your one stop mail backup and archiving tool for Mac.
Conholdate.Total for .NET - Conholdate.Total for .NET is a powerful suite of .NET APIs that gives software developers the ability to create, manipulate, convert, compare & view Word, Excel, PowerPoint, Outlook, Photoshop, AutoCAD, OpenOffice & more than 100 file formats.
BitRecover Office 365 Backup Software - Backup Office 365 emails from the cloud to the local computer in multiple standard file extensions like PST, MSG, EML, MBOX, OLM, PDF, XPS, DOC, etc. BitRecover Office 365 Backup Software has several advanced filter options for selective backup.