Landing Pages in MailChimp - Easy to build, custom landing pages for free
Aboardly - IFTTT for automated customer emailing
Viral Loops for Startups - Virality for startups made easy 💪
BurnChurn - 🔥 Reduce churn and track exit feedback for your SaaS
Carrd - Simple, responsive one-page site creator.
Customer.io - We make it easy to send emails triggered by user behavior. Build, measure and improve your emails to activate and retain users