Intercom on Product Management - The ultimate resource for aspiring product managers
The Product Manifesto - Product Managers face the biggest challenges of our day, which is why our community needs a common set of product principles.
userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.
Product Management Exercises - A repository of product manager job interview exercises
ithinki - A simple user feedback tool for start-ups
Software Product Management Stack - Resources & tools to help you manage your software product