The Y Combinator Database - The definitive database of YC companies with all the metrics
WeShelter - Unlock a donation when you pass a homeless person in NYC
The Speed of a Unicorn - See how long it took for startups to become unicorns 🦄
TAP London - Tackling the homeless problem together
YC World - Explore Y Combinator companies by country
Catchafire - Use your professional skills to help charities