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.
On Deck - Business Loans | Small Business Funding | OnDeck
Siftery - Share products your company uses and get personalized recommendations
Founder Secrets - Practical advice from the world's best startup founders
Codementor - “Instant help from expert developers. Codementor is your instant 1:1 expert mentor helping you in real time.”