Hoodmaps - Crowdsourced neighborhood 🗺 maps to navigate a city 💫
Startup School - How to start a startup, by Y Combinator
YouMap - The Human Atlas™
YC World - Explore Y Combinator companies by country
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.