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

Memory and context engine + app that is extremely fast, scalable, and can be run fully locally. The Memory API for the AI era.

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.