21st.dev is a big marketplace of React and Tailwind components from many authors, each ready to paste into your AI editor as a prompt. If you want a library that is free end to end, one consistent style across your app, or a finished app screen instead of browsing, these are worth a look.
21st.dev collects more than 12,000 React components, templates and shadcn themes from many authors (their count), built on React, Tailwind CSS and shadcn/ui. Each component comes as a prompt you paste into Cursor, Claude Code, v0 or Lovable, and browsing is free. It is great when you want to see many takes on the same component before you pick one.
Pick qodesign when you know the screen you need and want it finished: an animated login, an OTP screen, a cart, a checkout or a tab bar. Each piece is one whole interaction in React + TypeScript and Tailwind, made in one style, with an HTML version and a PROMPT.md you paste into Cursor, v0 or Lovable so the agent wires it to your own logic. You buy only the pieces you use, and the free kit and the MIT repo on GitHub let you try them first.
Side by side with 21st.dev: qodesign vs 21st.dev.