imapsync - Console-based utility for migrating IMAP mailboxes.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
OfflineIMAP - OfflineImap synchronizes email between an IMAP server and a MailDir or between two IMAP servers.
Microsoft Teams - Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.
iSync - iSync is a software application published by Apple Inc.
RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.