Product School - The global leader in product management training
Pramp for Product Managers - Practice product management mock interviews with other PMs
The Product Folks - A volunteer-led community of product managers and makers
Speechapp - The simplest way to practice for your next job interview
Intercom on Product Management - The ultimate resource for aspiring product managers
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.