The Y Combinator Database - The definitive database of YC companies with all the metrics
Brickit - Use ML to detect what can be built from your pile of legos
Startup School - How to start a startup, by Y Combinator
Lego Boost - Build + Code + Play
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.
Legoizer - Turn images into Lego murals.