MailPoet - MailPoet is an email newsletter plugin for Wordpress.
RevResponse - RevResponse empowers advanced Publishers to viably adapt all types of B2B activity by means of automatic promotion advances, local publicizing, and the biggest stock of expert substance.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
AWeber - AWeber is an Email marketing software that's easy to use. Send email newsletters & autoresponders and deliver top notch emails.
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
Yodle - Yodle is a leading local online marketing company with 50,000+ local business customers.