Blogsend - Automagically send your blog posts straight to your readers
imapsync - Console-based utility for migrating IMAP mailboxes.
Visual Marketing Automation - An insanely fast automation builder by ConvertKit
Gmvault - Backup the emails in your Gmail account.
Landing Pages in MailChimp - Easy to build, custom landing pages for free
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.