Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
AWeber - AWeber is an Email marketing software that's easy to use. Send email newsletters & autoresponders and deliver top notch emails.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
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.
Mailjet - All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.
Yodle - Yodle is a leading local online marketing company with 50,000+ local business customers.