Primer is GitHub's design system. This is the CSS implementation

CSS3 Animations with special effects

Modern framework to print the web correctly.                                               

Vapid is an intentionally simple content management system built on the idea that you can create a custom dashboard without ever leaving the HTML.

A Webpack boilerplate for static websites that has all the necessary modern tools and optimizations built-in. Score a perfect 10/10 on performance.

A modern CSS framework — versatile, well documented.