The Y Combinator Database - The definitive database of YC companies with all the metrics
My Charity Change - Round-up daily transactions & donate to charities
Startup School - How to start a startup, by Y Combinator
4thWall - A free Google Chrome extension that raises money for charities while you stream shows and movies right on your favorite websites.
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.
Hedado - Donate like a boss with Hedado!