CSS GitHub Repositories (2026) · Open Source Tools

Beautifier for javascript

Competitive Splatoon Platform

Refreshing CSS

Turn Off the Lights Browser extension for Google Chrome, Firefox, Opera, Safari, Naver Whale, Yandex, Samsung Internet, and Microsoft Edge.

Juice inlines CSS stylesheets into your HTML source.

eepp is an open source, cross-platform C++ GUI framework for building desktop applications, tools, and rich graphical interfaces.

Fast and lightweight HTML/CSS rendering engine

Highly effective, super-configurable, well-tested web page minifier (enhanced successor to HTML Minifier)

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

Advanced Java CSS 3 parser and builder

Interactive motion, written in CSS. Tilt, parallax, magnetic, drag, and scroll effects as CSS properties, animated with springs. 14 KB, no dependencies.

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

OpenUI5 lets you build enterprise-ready web applications, responsive to all devices, running on almost any browser of your choice.

Less. The dynamic stylesheet language.

An extended table for integration with some of the most widely used CSS frameworks. (Supports Bootstrap, Semantic UI, Bulma, Material Design, Foundation, Vue.js)

A mighty CSS linter that helps you avoid errors and enforce conventions.

Beautiful and accessible math in all browsers

The awesome document factory

The utility-first workflow you love from Tailwind CSS in your React Native applications.

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