Mailzak - Give a boost to your #EmailMarketing
Mailmeteor - Send hundreds of personalized emails with Gmail.
rasa.io - Get more from your email list.
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!
Mailazy - Modern Email Delivery API
Email on Acid - We make the send button safer. For every campaign, every message, and every inbox, Email on Acid has the time-saving tools you need to put your best email forward.