ShortStack - Shortstack is a website that allows you to create viral online events for your social media followers or other online audience.
MailerLite - Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!
HubSpot Marketing Hub - HubSpot is a cloud-based inbound marketing software that allows businesses to transform the way that they market online.
GetResponse - Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.
Woobox - Woobox helps you easily create powerful contests, sweepstakes, coupons, and more to grow your fans...
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES