Everything.PM - 300+ resources & tools for PMs, sorted by votes
Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
PM Starter Pack - Practical guide on how to get started in product management
WIP.co - Work in progress. We are a community of makers who help each other ship product.
Product Manager Handbook - Interviews w/ product managers + weekly newsletter
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.