Rapidly build efficient sites with Neat, the minimalist css framework.
You may also be interested in ...
NES.css
NES.css is NES-style (8bit-like) CSS Framework.
Beercss
Build material design in record time without stress for devs.
Pico CSS
Minimal CSS Framework for semantic HTML. Elegant styles for all natives HTML elements without .classes and dark mode automatically enabled.
PaperCSS
The less formal CSS framework.