Cryoserver - Cryoserver is an all-in-one email archiving solution that empowers you to preserve your email in a tamper-evident archive, making you transform your data into a useful archive for everyday use.

Skype for Slack - Move your slack discussions to a group skype call

imapsync - Console-based utility for migrating IMAP mailboxes.

Calls on Slack - Make voice calls in Slack

Gmvault - Backup the emails in your Gmail account.

CallKite - Your website’s video call center in just one click.