UI-Lib publishes ShadcnKit — a paid component-library and starter kit built on top of shadcn/ui, the popular copy-and-paste React component library. The kit ships pre-built blocks for landing pages, dashboards, and the standard application patterns.
The CourseFlix listing carries ShadcnKit — The Ultimate Building Blocks for Shadcn UI. Material is paid and aimed at developers building React / Next.js applications on the shadcn/ui foundation.