gerillass
Gerillass is an open-source toolkit that contains a set of Sass mixins to help designers and developers to create better, faster and consistent user interfaces.
@nuvoui/core
NuvoUI is a human-friendly SCSS framework designed for simplicity, and modern responsive designs.
sass-pire
Just a more mixins and functions with SCSS for more productive projects.
vitals-scss
A minimalistic bundle of a few CSS/Sass tools for building modern, flexible websites: an improved normalize, shorthand stuff for flexbox and grid, and a fluid sizing function.