Link:21st Labs, Inc.
21st.dev: Community UI Registry for React and shadcn Themes
21st.dev is an interface registry featuring over 12,000 React components, templates, and themes. Designed around Tailwind CSS and shadcn/ui conventions, components can be added directly via prompts into AI coding assistants like Claude Code, Cursor, and Lovable.
From X post: Eight Frontend Resources for Claude Code and Opus 5.5