GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
Journeys by Indicative - Discover all the paths customers take through your product
Elevatr Email Marketing Automation - Fast and easy email marketing software
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
Plainflow - Behavior-based customer journeys for your SaaS
Email Marketing: A Beginner's Guide - Master email marketing with these 3 short ebooks from Drip.