Top CSS GitHub Repositories & Tools (2026)

A pixel-perfect dev portfolio and shadcn registry.

A Next.js 16.3 music player demo showcasing Instant Navigations with Cache Components and Partial Prefetching.

Ruby HTML and CSS sanitizer.

A Parser for CSS Files written in PHP. Allows extraction of CSS files into a data structure, manipulation of said structure and output as (optimized) CSS

Change the appearance of the web instantly

Free, open source mental health communication web app to share experiences with loved ones

Kotlin wrappers for popular JavaScript libraries

Laravel Admin panel and more. Simple for beginners and powerful for experts. Using Blade, Alpine.js and Tailwind CSS.

Laravel-based web POS system with Vue.js, Tailwind CSS, inventory management, sales processing, customer records, reports, and modular extension support.

Firefox CSS Theme/Style for manual customization

React UI components of the Yamada, by the Yamada, for the Yamada built with React and Emotion.

🚀 A real-time monitoring dashboard for Claude Code & Codex, built with SQLite3, Node.js, Express, React, Vite, TailwindCSS, & WebSockets. It tracks sessions, agent activity, tool usage, and subagent orchestration, providing live analytics, a Kanban status board, status notifications, a cute buddy, & an interactive web UI/MacOS/Windows native app.

daily.dev application suite

Converts CSS styles into inline style attributes in your HTML code.

CSS selectors complexity and performance analyzer

eepp is an open source cross-platform game and application development framework heavily focused on the development of rich graphical user interfaces.

🔥 Next.js (React) headless eCommerce site with Typescript, WordPress (WooCommerce) backend and Algolia search

Plug-and-play web font optimization and configuration for Nuxt apps.

Contextual output encoding for Java 8+: HTML, JavaScript, CSS, XML and URI components. Zero-dependency core with optional JSP, Jakarta and ESAPI adapters.

Machine-readable references of terms defined in web browser specifications