5 Sites I Use So My Vibe-Coded Apps Don't Look AI-Generated

I teach AI and web development, and the most common thing I see in vibe-coded apps is that they all look the same: same gradients, same cards, same "AI default" feel. The fix isn't a better model. It's better references and better components. Here are the five I keep coming back to.

1. 21st.dev

What it is: A large library of React + Tailwind CSS components, templates and shadcn themes made by design engineers, with a CLI (npx @21st-dev/cli add) and an MCP server so your AI agent can find and install components.
Use it when: You want polished, real-world sections (heroes, AI chat UIs, pricing, sign-ins) and you're working with Cursor, Claude Code or another MCP client.
Free vs paid: A free account can copy 2 components a day. Paid plans remove the limit.

2. React Bits (reactbits.dev)

What it is: Free animated React components: text animations, backgrounds and micro-interactions. Pick JavaScript or TypeScript, with plain CSS or Tailwind, then copy the source or install it with the CLI.
Use it when: Your UI works but feels flat and you want a bit of motion that you fully own and can tweak.
Free vs paid: The main library is free. React Bits Pro (pro.reactbits.dev) is a paid one-time purchase that adds blocks, app UI and templates.

3. Magic UI (magicui.design)

What it is: 150+ free, open-source animated components built with React, TypeScript, Tailwind CSS and Motion, designed as a companion to shadcn/ui.
Use it when: You're building a landing page and already use shadcn/ui.
Free vs paid: The components are free. Magic UI Pro (pro.magicui.design) sells landing-page templates and sections for a one-time fee.

4. Uiverse (uiverse.io)

What it is: A community-made, open-source library of UI elements such as buttons, cards, loaders and inputs. Copy them as HTML/CSS, Tailwind, React or Figma.
Use it when: You need one small element that looks hand-made, even without React.
Free vs paid: The site says it's 100% free for personal and commercial use.

5. Mobbin (mobbin.com)

What it is: Not a component library. It's a UI/UX reference library of screens from real, shipped mobile and web apps.
Use it when: You need to see how real products design onboarding, paywalls or settings before you prompt your AI.
Free vs paid: Joining is free, with limited access to apps and sites. Flows, animations and search need a paid plan, and there's a student/educator discount.

Quick tip

Don't ask your AI for "a modern UI". Pick one real reference screen from Mobbin, choose one component library (mixing five libraries is how apps start looking generic), and give the AI your brand colours, font and spacing scale. Consistency is what makes an app look designed.

What's on your list? Drop it in the comments.

— KD Jayakody