PM Starter Pack - Practical guide on how to get started in product management
The Product Management guide - A book on how to create and ship products that people love
Product School - The global leader in product management training
Intercom on Product Management - The ultimate resource for aspiring product managers
know/how Product Managers - A weekly newsletter with 5 practical tweet-length PM tips
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.