The Product Manifesto - Product Managers face the biggest challenges of our day, which is why our community needs a common set of product principles.
The Product Management guide - A book on how to create and ship products that people love
Product Management Journal - The leading reference for technology-based products
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
Intercom on Product Management - The ultimate resource for aspiring product managers
Nifty - Manage projects, work, and communications in one place.