The Product Management guide - A book on how to create and ship products that people love
InterviewBuddy - Replace fear with confidence
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
The PM Interview - Practice PM Interview Questions (w/ timer).
Intercom on Product Management - The ultimate resource for aspiring product managers
Pramp for Product Managers - Practice product management mock interviews with other PMs