Viable Fit - Measure and improve your product market fit
The Product Management guide - A book on how to create and ship products that people love
OpinionX - Stack rank people's priorities in minutes with OpinionX's free ranking surveys.
Intercom on Product Management - The ultimate resource for aspiring product managers
Product Fit - Measure product/market fit in app with your users.
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.