The Product Manifesto - Product Managers face the biggest challenges of our day, which is why our community needs a common set of product principles.
Useberry - User testing feedback and rich analytics in minutes
Intercom on Product Management - The ultimate resource for aspiring product managers
Peek by UserTesting - Get a free, 5-minute video of someone using your site
Product School - The global leader in product management training
Easy User Test - Easy User Test is a user testing tool that offers the easiest way to test your text and design.