MigrationWiz - MigrationWiz provides on-demand mailbox migration services through a fully automated cloud-based...
imapsync - Console-based utility for migrating IMAP mailboxes.
Shoviv GroupWise to Office 365 - Shoviv presents the best GroupWise to Office 365 migration tool, helps to migrate from GroupWise to Office 365, Outlook PST, EML, MSG & many more.
mnIMAPSync - mnIMAPSync - Java IMAP email syncing tool
MailStore - MailStore Home - A 100% free single-private-user desktop solution
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.