Invision - Prototyping and collaboration for design teams
Product School - The global leader in product management training
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
The Product Manifesto - Product Managers face the biggest challenges of our day, which is why our community needs a common set of product principles.
Craftwork - A collection of User Interface resources made by Craftwork
Intercom on Product Management - The ultimate resource for aspiring product managers