DistroKid - Unlimited uploads to iTunes and more. Keep 80-100% of your royalties.
The Y Combinator Database - The definitive database of YC companies with all the metrics
TuneCore - Music distribution platform for artists to sell their content worldwide
Startup School - How to start a startup, by Y Combinator
LANDR - LANDR is online music software for creators: music mastering, digital music distribution, free sample packs, collaboration tools, music promotion, and more. Try it free.
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.