24me - Next Generation Personal Assistant
The Y Combinator Database - The definitive database of YC companies with all the metrics
WeekCalendar - WeekCalendar is an all-in-one calendar application designed to provide everyone with all the features they need to work to their fullest.
Startup School - How to start a startup, by Y Combinator
Pocket Informant - Pocket Informant is the Best Calendar app for mac and iOS. Pocket Informant for iOS, Mac desktop, and Android.
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.