Top CSS GitHub Repositories & Tools (2026)

An AI skill that provides design intelligence for building professional UI/UX across multiple platforms.

Composable, accessible components with thoughtful defaults. Build your own component library with code you can customize, extend, and make your own.

An agent-first linter for Tailwind design systems. Write design system rules that agents can verify.

Coding articles to level up your development skills

Fullstack app framework for web, desktop, and mobile.

A utility-first CSS framework for rapid UI development.

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

A web component for visual art and creative coding

🌼 🌼 🌼 🌼 🌼  The most popular, free and open-source Tailwind CSS component library

cn is a new engine for Tailwind class merging and conflict resolution. It replaces tailwind-merge and clsx. Same APIs. Full parity. And it is 30× faster.

A powerful open-source UI framework for Laravel • Build and ship apps & admin panels fast with Livewire

Tabler is free and open-source HTML Dashboard UI Kit built on Bootstrap

Rallly is an open-source scheduling and collaboration tool designed to make organizing events and meetings easier.

Keep your code spotless

Beautifier for javascript

Class Variance Authority

The smallest, fastest, most feature complete Tailwind-in-JS solution in existence.

Juice inlines CSS stylesheets into your HTML source.

Open-source SaaS Starter with User Roles, Organizations & Admin Panel. Built using Next.js 16, Better Auth, Drizzle, Neon, Fumadocs, Shadcn/ui, Stripe, Server Actions.

Minimalistic Homebrew GUI made with Go, Wails and React.