Interactive NPS Calculator (by Delighted) - Calculate your NPS easily with this interactive free tool.
Landing Pages in MailChimp - Easy to build, custom landing pages for free
TinyNPS - Simple NPS feedback
Viral Loops for Startups - Virality for startups made easy 💪
Delighted + NomNom Integration - Turn your NPS responses into product insights
Carrd - Simple, responsive one-page site creator.