Officehours - Connects you with amazing people, for one on one advice
Startup School - How to start a startup, by Y Combinator
Out of Office Hours - Connecting newcomers and people working in the tech industry
The Y Combinator Database - The definitive database of YC companies with all the metrics
OOOTwitter - Out-of-office reply for Twitter
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.