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!
rasa.io - Get more from your email list.
Elevatr Email Marketing Automation - Fast and easy email marketing software
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
Mailshake - Mailshake lets you build your professional network through a smart and intuitive approach to cold emailing.
Email Marketing: A Beginner's Guide - Master email marketing with these 3 short ebooks from Drip.