Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
SnakeLogic - The puzzle based snake game
Hashnode App - Hashnode is a free blogging platform for developers who want to plug into the global dev community while retaining ownership of their content.
Gumroad Small Product Lab - Bite-sized lessons to help you launch your product.
Normal Software - Insights and ideas from businesses outside of tech
Productbox - Talk with fellow product managers about how you do stuff.