I run betterdev.link, a weekly newsletter with links aim to help you become a better developer, sharing tips on that as well.

Beside that I build and run ec2.shop, a website and API allow you to check EC2 price on-demand, spot, reserved instance quickly.

I also build https://github.com/yeo/bima, a native app for two factor authentication. Like Google Auth or Authy but 100% open source, including both of client/server. It's a native app, small and lightweight