Interactive NPS Calculator (by Delighted) - Calculate your NPS easily with this interactive free tool.
TinyNPS - Simple NPS feedback
SalesRight - Customizable interactive pricing guides for B2B SaaS sales
Delighted + NomNom Integration - Turn your NPS responses into product insights
AppFollow - AppFollow is an integrated solution that makes monitoring, analyzing, and elevating your app's reputation easy.
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.