Stack guides / UI kits
Frameworks, component libraries, icons, fonts and the small libraries most apps end up needing. All free; most are MIT licensed.
46 options. Free tiers, catches and prices checked by hand on 2026-10-27; each one links to its sources.
Where we’d start: shadcn/ui. The components AI tools use by default; the code is copied into your project so you can change anything.
A framework for fast content sites: plain HTML by default, with interactive parts only where you need them.
Best for: Blogs, docs, landing pages and directories that need to rank in search. Skip it if: Your app is mostly logged-in screens with lots of interactivity.
Free and open source
Free
Checked 2026-10-27: github.com
The usual way to build React Native apps for iPhone and Android from one codebase.
Best for: Mobile apps built by web developers or with AI tools. Skip it if: You only need a website: a responsive web app is cheaper to ship.
Free plan (EAS)
Publishing on the App Store also needs an Apple Developer account, which is paid yearly.
Starter, $19/mo plus usage
Checked 2026-10-27: expo.dev, github.com
The most used React framework: pages, server code and API routes in one project.
Best for: Web apps that need server code, SEO and a big ecosystem; AI coding tools know it best. Skip it if: You only need a simple static site.
v0 generates Next.js, and Claude Code and Cursor know it very well.
Free and open source
Free
Checked 2026-10-27: github.com
A React single-page app built with Vite: quick to develop and easy to host anywhere.
Best for: Apps where a backend service such as Supabase handles data and login. Skip it if: Search engines need to read your pages without running JavaScript.
Bolt and Lovable projects created before May 2026 use React, Vite, Tailwind and shadcn/ui.
Free and open source
Free
Checked 2026-10-27: github.com, github.com
React with server loaders and actions; the framework Remix became.
Best for: React apps that want server rendering without Next.js conventions. Skip it if: You’re new to React: Next.js has more tutorials and templates.
Free and open source
Free
Checked 2026-10-27: github.com
Svelte’s app framework: small, fast pages with server code built in.
Best for: Developers who prefer Svelte’s simpler syntax. Skip it if: You want the widest choice of ready-made components, which are mostly React.
Free and open source
Free
Checked 2026-10-27: github.com
A full-stack React framework from the TanStack team, with type-safe routing and server functions.
Best for: React apps that need server code and deploy to Node, Workers or most serverless hosts. Skip it if: You want the biggest pool of tutorials and templates (Next.js has more).
Lovable builds new apps on TanStack Start (since May 2026); older Lovable projects use React and Vite.
Free and open source
Free
Checked 2026-10-27: github.com, docs.lovable.dev
Copy-into-your-project React components built on Tailwind CSS and headless primitives, with a CLI and registry.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Headless, accessible components for React, Vue, Solid and Svelte.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Accessible, themeable React component system.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Tailwind CSS plugin that adds semantic component classes and themes.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Tailwind CSS component library with interactive JS components.
A paid Pro version adds more components and blocks.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Unstyled, accessible components designed for Tailwind CSS.
No release or commit since Apr 2026.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
React component library (formerly NextUI) styled with Tailwind CSS.
v3 is the current major; package and repo licenses differ but both are permissive.
Free and open source
Free
Checked 2026-10-27: github.com, github.com, npmjs.com
Animated React components (shadcn-style, Tailwind CSS and Motion) for landing pages.
Free and open source
Free
Checked 2026-10-27: github.com
Full-featured React component library with hooks, forms and date/chart packages.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
React component library implementing Material Design.
MIT covers Material UI; advanced MUI X components (e.g., Data Grid Pro/Premium) need a paid commercial license.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Copy-paste React components; now coss ui (Cal.com’s design system on Base UI), with Origin UI kept as a legacy snapshot.
Origin UI is legacy with limited support; origin-space/originui redirects to cosscom/ui.
Free and open source
Free
Checked 2026-10-27: github.com, github.com
Unstyled, accessible React UI primitives.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Utility-first CSS framework.
The official component/template collection, Tailwind Plus, is paid.
Free and open source
Free
Checked 2026-10-27: github.com, tailwindcss.com
Copy-paste React chart and dashboard components built on Tailwind CSS and Recharts.
Effectively unmaintained: no commits in the last 12 months.
Free and open source
Free
Checked 2026-10-27: github.com, github.com, npmjs.com
Animated Tailwind CSS and Motion React components copied from the website.
Pro licence allows unlimited end products but bans marketplace resale and selling templates; confirm the free-component terms before shipping.
No free plan
Free
Checked 2026-10-27: ui.aceternity.com
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Unified framework for using icons from 100+ open icon sets.
Each icon set keeps its own license; some require attribution.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Open-source icon set with packages for React and other frameworks.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Flexible icon family in six weights with React and other packages.
Slow: no package release since May 2025.
Free and open source
Free
Checked 2026-10-27: github.com, github.com, npmjs.com
Large set of free SVG icons with framework packages.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Self-host open-source fonts as npm packages.
Font files keep their original licenses (mostly SIL OFL).
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Free font library you can link to or self-host.
Commercial use and self-hosting allowed; check each family’s license and any Reserved Font Name before modifying.
No free plan
Free
Checked 2026-10-27: github.com
Hand-drawn-style whiteboard app and embeddable React component.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Collaborative interface design, prototyping and whiteboarding tool.
Starter (free)
Professional Full seat, $16/mo
Checked 2026-10-27: figma.com, help.figma.com
Open-source, self-hostable design and prototyping tool (Figma alternative).
Free and open source
Free
Checked 2026-10-27: github.com, github.com
Free, colour-customisable SVG illustrations.
Free
You may not redistribute the illustrations as packs, build a competing service or use them for AI training.
Free
Checked 2026-10-27: undraw.co
TypeScript SQL ORM and migration toolkit.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Animation library for React and JavaScript.
Motion+ is a paid one-time membership for premium examples, components and the AI Kit; the library itself is free.
Free and open source
Free
Checked 2026-10-27: github.com, motion.dev
Cross-browser end-to-end testing and browser automation.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Type-safe ORM with schema, migrations and query client for Node.js/TypeScript.
Repo renamed from prisma/prisma to prisma/orm; the npm prisma package’s latest tag points to 8.0.0-rc.28 while @prisma/client latest is 7.10.1, so pin matching versions.
Free and open source
Free
Checked 2026-10-27: github.com, github.com, npmjs.com
Build and preview HTML emails with React components.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Performant form state and validation for React.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Composable React charting library built on D3.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Async server-state fetching, caching and syncing for React and other frameworks.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Headless table and data-grid logic for React and other frameworks.
v9 is the current major version.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Headless rich-text editor framework built on ProseMirror.
Collaboration, comments, AI toolkit and other Platform features are paid (Start $49/mo, Team $149/mo, Business $999/mo; 30-day trial).
Free and open source
Free
Checked 2026-10-27: github.com, tiptap.dev
End-to-end type-safe APIs for TypeScript without code generation.
Free and open source
Free
Checked 2026-10-27: github.com, github.com
Vite-native unit test framework.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
TypeScript-first schema declaration and validation.
Free and open source
Free
Checked 2026-10-27: github.com, npmjs.com
Not sure what you need? Describe your app and the Build Kit picks a whole free stack, with starters and a plan.