Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
NoCode Club - The StackOverflow for no-code makers
Showwcase - A social network for developers that lets you make money
Indie Worldwide - Virtual events with indie founders from around the world
Community List - Find hundreds of communities to promote your product