The Big Book of Churn - The definitive guide to customer churn reduction
Landing Pages in MailChimp - Easy to build, custom landing pages for free
INQ.Social - Engage with customers & apply the data to marketing
Viral Loops for Startups - Virality for startups made easy 💪
Postmark - Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
Carrd - Simple, responsive one-page site creator.