MailChimp - MailChimp is the best way to design, send, and share email newsletters.
MailerLite - Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
Publicate - Create Successful Newsletters & Roundups
SendInBlue - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
GetResponse - Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.