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!
Mailzak - Give a boost to your #EmailMarketing
Gmail Mail Merge - Send personalized emails with attachments
rasa.io - Get more from your email list.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Mailblast - Email marketing on a budget using Amazon SES