MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
AWeber - AWeber is an Email marketing software that's easy to use. Send email newsletters & autoresponders and deliver top notch emails.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
ActiveCampaign - Integrated email marketing, marketing automation, and small business CRM. Send beautiful newsletters, setup behavioral based automations, and benefit from sales automation.
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates