Software Product Management Stack - Resources & tools to help you manage your software product
Useberry - User testing feedback and rich analytics in minutes
The Product Management guide - A book on how to create and ship products that people love
Peek by UserTesting - Get a free, 5-minute video of someone using your site
Product Management Exercises - A repository of product manager job interview exercises
Easy User Test - Easy User Test is a user testing tool that offers the easiest way to test your text and design.