Jupyter - Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.

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.

Kajero - Interactive JavaScript notebooks - create good-looking, responsive, interactive documents.

Gmvault - Backup the emails in your Gmail account.

BeakerX - Open Source Polyglot Data Science Tool

imapsync - Console-based utility for migrating IMAP mailboxes.