Rewardful - All-in-One Affiliate Management Software for SaaS
MailerLite - Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!
Weferral - Open source referral & affiliate management software
Revue - The easiest way to create and send a curated newsletter
SC Conjured Referrals - Boost sales with a beautiful, customizable referral program.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES