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
The Product Folks - A volunteer-led community of product managers and makers
Better Product Manager - Experience the life of a PM through these tests
Product Tactics - An eBook for modern product management teams
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.