Electron : Build cross platform desktop apps with web technologies
Milligram : Milligram provides a minimal setup of styles for a fast and clean starting point. Just it! Only 2kb gzipped! It's not about a UI framework. Specially ...
YAML : A modular CSS framework for truly flexible, accessible and responsive websites
A utility-first CSS framework packed with classes like flex, pt-4, text-center and rotate-90 that can be composed to build any design, directly in your markup.