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!
MailChimp Snap - Send simple, photo-based email campaigns from your phone.
Elevatr Email Marketing Automation - Fast and easy email marketing software
Polymail Sequences - Simple, powerful multi-stage email campaigns
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
Pico - A stupidly simple and blazing fast, flat file CMS