MailerLite - Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.
GetResponse - Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
MJML - The open source framework for responsive emails