LetterHunt - LetterHunt connects you to 10,000+ niche, active newsletter writers to promote your product.
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
Newsletter Operating System - All-in-one dashboard to launch & grow your newsletter
Geneva - An all-in-one communication app for groups & communities
Unzip.dev - Discover the latest developer trends
Figma Community - Publish live design files for others to learn from & remix.