Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
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.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Gmvault - Backup the emails in your Gmail account.
Google Cloud Functions - A serverless platform for building event-based microservices.
imapsync - Console-based utility for migrating IMAP mailboxes.