Interactive NPS Calculator (by Delighted) - Calculate your NPS easily with this interactive free tool.
YesInsights - Get Customer feedback with simple one-click or NPS surveys
TinyNPS - Simple NPS feedback
Wootric - Wootric is software that allows apps and websites to take customer satisfaction surveys so that you can properly gauge the popularity and success of your app through the eyes of the people using it. Read more about Wootric.
Delighted + NomNom Integration - Turn your NPS responses into product insights
Interactive NPS Benchmarks – Delighted - Enter your score, pick your industry, and compare your NPS