CSS design-system

Open-source CSS projects categorized as design-system

Top 10 CSS design-system Projects

design-system
  1. 98.css

    A design system for building faithful recreations of old UIs

    Project mention: Show HN: Windows 7 GUI for the Web | news.ycombinator.com | 2025-07-27
  2. SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

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  3. basscss

    Low-level CSS Toolkit – the original Functional/Utility/Atomic CSS library

  4. system.css

    A design system for building retro Apple interfaces

  5. ui-buttons

    100 Modern CSS Buttons. Every style that you can imagine.

  6. argon-design-system

    Argon - Design System for Bootstrap 4 by Creative Tim

  7. spectrum-css

    The standard CSS implementation of the Spectrum design language.

  8. rippleui

    Clean, modern and beautiful Tailwind CSS components.

  9. vanilla-css-design-system

    Purely Vanilla: A Minimalist CSS Design System (no SCSS or JavaScript needed)

  10. wcag-aaa-web-design

    An open-source WCAG 2.2 AAA accessible design system and AI agent skill for building enterprise web applications. Includes a full component library, templates, and validation scripts for corporate/formal web apps.

    Project mention: Show HN: WCAG 2.2 AAA Toolkit – AI Skill for Accessible Web Apps | news.ycombinator.com | 2026-02-15
  11. spinwheel

    The vanilla Javascript game to help you stay mildly fit.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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CSS design-system related posts

  • Gurus of 90s Web Design: Zeldman, Siegel, Nielsen

    2 projects | news.ycombinator.com | 29 May 2025
  • System.css: A design system for building retro Apple interfaces

    1 project | news.ycombinator.com | 28 May 2025
  • System.css: A CSS Library for Classic Apple System OS-Inspired Interfaces

    2 projects | dev.to | 17 Mar 2025
  • Show HN: Cs16.css – CSS library based on CS 1.6 UI

    33 projects | news.ycombinator.com | 24 Jan 2025
  • 98.css – A design system for building faithful recreations of old UIs

    32 projects | news.ycombinator.com | 5 Nov 2024
  • Recreating History: Building a Windows 98 Disk Defrag Simulator with Modern Web Tech

    1 project | dev.to | 14 Jul 2024
  • Create a Windows 98 Style UI with 98.css

    1 project | news.ycombinator.com | 29 May 2024
  • A note from our sponsor - SaaSHub
    www.saashub.com | 7 Jun 2026
    SaaSHub helps you find the best software and product alternatives Learn more →

Index

What are some of the best open-source design-system projects in CSS? This list will help you:

# Project Stars
1 98.css 11,091
2 basscss 5,897
3 system.css 3,772
4 ui-buttons 3,740
5 argon-design-system 2,478
6 spectrum-css 1,275
7 rippleui 1,042
8 vanilla-css-design-system 42
9 wcag-aaa-web-design 10
10 spinwheel 0

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