The Product Management guide - A book on how to create and ship products that people love
TinyNPS - Simple NPS feedback
Intercom on Product Management - The ultimate resource for aspiring product managers
Interactive NPS Calculator (by Delighted) - Calculate your NPS easily with this interactive free tool.
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
Jaco - Watch and analyze your users’ behavior