Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
The Y Combinator Database - The definitive database of YC companies with all the metrics
WIP.co - Work in progress. We are a community of makers who help each other ship product.
Startup School - How to start a startup, by Y Combinator
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
Y Combinator Companies - Interactive list of all 1000+ YC companies