Everything.PM - 300+ resources & tools for PMs, sorted by votes
LetterHunt - LetterHunt connects you to 10,000+ niche, active newsletter writers to promote your product.
PM Starter Pack - Practical guide on how to get started in product management
Newsletter Operating System - All-in-one dashboard to launch & grow your newsletter
Product Manager Handbook - Interviews w/ product managers + weekly newsletter
Unzip.dev - Discover the latest developer trends