Nawvel - Nawvel is a handy-dandy library of tried, tested & curated resources.
Software Product Management Stack - Resources & tools to help you manage your software product
Micro-SaaS - All you need to build your own SaaS at one place.
The Product Management guide - A book on how to create and ship products that people love
Makerbook - A directory of the best free resources for creatives
Product Management Exercises - A repository of product manager job interview exercises