MailerLite - Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!

Campaign Genius - Send dynamic email content through any platform, instantly.

GetResponse - Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.

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!

Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES

MailChimp Snap - Send simple, photo-based email campaigns from your phone.