Rebassjs - React Primitive UI Components

Rebass is a free react UI Kit that comes with a simple component library made with Styled System by Brent Jackson. This UI kit has only eight foundational components and all of them come in a tiny file. The components of this kit are developed for responsive web design and are extensible and themeable. Also, this UI kit offers a fast design and development system with a footprint of only 4KB. On GitHub, Rebass has gained over 6k stars with its first-class support.