MailChimp - MailChimp is the best way to design, send, and share email newsletters.
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!
Brevo - 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.
SmartrMail - SmartrMail is the easiest way to send best practice newsletters and automations for your store
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
.meteoremails - Send cold emails for free! Free and open source project