Adobe
Spectrum CSS
A CSS-focused library that expresses the design direction of Adobe's Spectrum design system. It is the foundation of the Spectrum Web Components styling and the internal React Spectrum library.
Adobe
Spectrum Web Components
A framework-agnostic component library leveraging web components to implement Adobe's Spectrum design system.
Red Hat
PatternFly Elements
A web component implementation of the Red Hat design system. It leverages the encapsulation of ShadowDOM and the power of custom properties to create well-scoped elements that are still designer-friendly.