pickSaaS - Hundreds of SaaS products, analyzed.
Product Manager Handbook - Interviews w/ product managers + weekly newsletter
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies
PM Starter Pack - Practical guide on how to get started in product management
SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Everything.PM - 300+ resources & tools for PMs, sorted by votes