imapsync - Console-based utility for migrating IMAP mailboxes.
Sharegate - Sharegate simplifies the migration and management of SharePoint, Office 365, and OneDrive for...
MailStore - MailStore Home - A 100% free single-private-user desktop solution
Micro Focus Content Manager - Micro Focus Content Manager is an easy-to-use document and records management system that helps capture, manage, and secure business information, whether it’s digital or physical data.
audriga Email and Groupware migration - Easily migrate your email, contacts, calendar items and tasks to your new provider or server. No software installation is required.
Saketa Sharepoint Migration Tool - Saketa SharePoint Migrator is a hub of exciting, interesting and advanced features. One of the best applications for SharePoint migration, you can migrate data from all versions of SharePoint, O365 and, the Cloud.