







A design system for building faithful recreations of old UIs.

Open Props UI | A modern CSS UI library
CSS UI library leveraging the most modern features. Components you can copy and paste into your project.

The State of CSS 2020: Conclusion
The annual survey about the latest trends in CSS.

Modern CSS snippets. Every old hack, replaced.
Side-by-side comparisons of outdated CSS techniques and their modern native replacements. Grid, custom properties, nesting, container queries, and more.

Modern CSS snippets. Every old hack, replaced.
Side-by-side comparisons of outdated CSS techniques and their modern native replacements. Grid, custom properties, nesting, container queries, and more.

Components.build
An open standard for building modern, composable and accessible UI components.

tailwindcss - npmx
A utility-first CSS framework for rapidly building custom user interfaces.

Radix UI
Components, icons, and colors for building high‑quality, accessible UI. Free and open-source.
Glen Maddern: Internet Pro
Let me tell you about what CSS Modules is, and why it’s the future.
Building a UI framework
Building a UI Framework Ian Hickson (ian@hixie.ch) — 2025 — First Edition — https://software.hixie.ch/ui-frameworksTo leave comments, use the edit version. Introduction This document examines important design decisions for creating a new graphical UI framework. It was commissioned to answer the...
una.im | Modern CSS theming with light-dark(), contrast-color(), and style queries
Combine three new CSS features to build fully adaptive themed components.

Ideas on modernizing the open-source desktop
Scott Jenson has been working on user interfaces (UIs) and user experience (UX) for many years [...]
18 Best CSS Libraries/Frameworks for UI/UX Designs 2024
Here are the 25 best CSS libraries/frameworks for UI/UX designs which make your frontend development more easier and productive with custom features.

2026 CSS wishlist – Nathan Knowler
What I’d like to see prioritized for CSS in 2026, how those features will allow us to create better web-based design systems, and how they renew separation of concerns.