Siftery - Share products your company uses and get personalized recommendations
Software Product Management Stack - Resources & tools to help you manage your software product
Stackshare - StackShare is a comprehensive website that gives its users the chance to organize and share their technology stack with the rest of the community.
The Product Management guide - A book on how to create and ship products that people love
SaaSHub - Find and promote software that will help you grow your business or to be more productive.
Product Management Exercises - A repository of product manager job interview exercises