Frog image by @Goug8888, used under Creative Commons license Attribution-NonCommercial-ShareAlike 2.0 Generic.
Frog is a static web site generator written in Racket.
You write content in Markdown or Scribble. You generate files. To deploy, you push them to a GitHub Pages repo (or copy them to Amazon S3, or whatever).
Posts get a variety of automatic blog features.
You can also create non-post pages.
Pygments handles syntax highlighting for code blocks.
The generated site uses Bootstrap, which is responsive, automatically adapting to various screen sizes.