Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
LetterHunt - LetterHunt connects you to 10,000+ niche, active newsletter writers to promote your product.
Elpha - The most powerful network for women in tech.
Unicorner - Unicorner is the startup newsletter that breaks down and sends one up-and-coming early-stage startup to your inbox every Monday morning.
Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
Dutch Startup Newsletter - Follow one of the world's most promising startup scenes