Startup Stash - A curated directory of 400 resources & tools for startups
CS183B - Startup Class - Stanford class taught by Sam Altman & guest speakers
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Classroomies - Watch Stanford CS & Startup lectures together
ProppyJS - Functional props composition for UI components (React & Vue)
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.