Startup School - How to start a startup, by Y Combinator
Y Combinator Companies - Interactive list of all 1000+ YC companies
Hyper Founder Program - An 8-week founder program inspired by Product Hunt
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.
Buildily Academy - Learn from the best startup leaders
BaseTemplates - The easiest way to build your pitchdeck and raise money