24me - Next Generation Personal Assistant
The Y Combinator Database - The definitive database of YC companies with all the metrics
Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
Startup School - How to start a startup, by Y Combinator
Awesome Cal - Awesome Cal is a Calendar application for your iPhone that you can take anywhere and keep close by to monitor all the upcoming birthdays, festivities, meetings, and more from a single place.
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.