Product School - The global leader in product management training
The Product Management guide - A book on how to create and ship products that people love
Software Product Management Stack - Resources & tools to help you manage your software product
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
PM Starter Pack - Practical guide on how to get started in product management
Better Product Manager - Experience the life of a PM through these tests