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Top 23 HTML CSS Projects
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Project mention: Regex Chess: A 2-ply minimax chess engine in 84,688 regular expressions | news.ycombinator.com | 2026-05-19
> Similarly, some people write complicated interactive web pages without using JS (…) Obviously, it's not something practical or even optimal.
There are people who navigate the web with JavaScript turned of, so those experiments do have practical applications.
There are entire projects around not using JavaScript.
https://theosoti.com/you-dont-need-js/
https://github.com/you-dont-need/You-Dont-Need-JavaScript
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CoreUI-Free-Bootstrap-Admin-Template
Free Bootstrap Admin & Dashboard Template Built for AI-Assisted Development
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flag-icons
:flags: A curated collection of all country flags in SVG — plus the CSS for easier integration
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HyperUI
Free Tailwind CSS v4 components for your next project, designed to enhance your web development with the latest features and styles 🚀
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Milligram - A minimalist CSS framework
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vcard-personal-portfolio
vCard is a fully responsive personal portfolio website, responsive for all devices.
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A couple years ago I made this https://bootstra386.com/ ... it's for a project. This is genuinely 1994 style with 1994 code that will load on 1994 browsers. It doesn't force SSL, this does work. I made sure of it.
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Project mention: Ask HN: Favorite text heavy blogs the are a joy to read | news.ycombinator.com | 2026-06-12
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preline
Preline UI is an open-source set of prebuilt UI components based on the utility-first Tailwind CSS framework.
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Project mention: Moving away from Tailwind, and learning to structure my CSS | news.ycombinator.com | 2026-05-16
Great writeup!
Lately I've been enjoying Open Props[0]. It's a library of CSS props/ variables that helps structure a design system. I like it because it's CSS-first, so like OP experienced moving off TW, I've learned more CSS, and it works with the browser not against it. It also provides some sane defaults for anyone less interested in fiddling with precise cosmetics.
[0]: https://open-props.style/
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My blog's style has Sakura.css [1] as its base, which keeps the paragraphs narrow on wide displays, limited 684 CSS pixels to aid readability. The justify text-style was a choice by me. Now I really wonder whether that hurt readability.
[1] https://github.com/oxalorg/sakura
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modern-font-stacks
System font stack CSS organized by typeface classification for every modern operating system
Hah, I ran into the same issue on Linux. I forgot that I only install a couple fonts on my machines (noto, cascadia, and adobe-source-*) so I was also looking at them thinking "Why are these all the same? Even handwriting looks like a normal typed font". Thanks for the suggestion to go to the github for the screenshots: https://github.com/system-fonts/modern-font-stacks
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Project mention: Repository Transformation: From Chaos to Professional Prompt Engineering Toolkit | dev.to | 2026-03-25
Built a professional catalog using monospace web design (credited to Oskar Wickström):
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).
HTML CSS discussion
HTML CSS related posts
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Ask HN: Favorite text heavy blogs the are a joy to read
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Show HN: Butterfly CSS framework forget class soup
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Regex Chess: A 2-ply minimax chess engine in 84,688 regular expressions
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CSS as a Query Language
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Show HN: Nimble.css minimal classless CSS library for great-looking default HTML
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Stop Coding, Start Drawing: Butterfly CSS v4.2 🦋product hunt launch today
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make css animation without leaving your html
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A note from our sponsor - SaaSHub
www.saashub.com | 12 Jun 2026
Index
What are some of the best open-source CSS projects in HTML? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | tabler | 41,126 |
| 2 | gentelella | 21,352 |
| 3 | You-Dont-Need-JavaScript | 20,534 |
| 4 | CoreUI-Free-Bootstrap-Admin-Template | 12,215 |
| 5 | flag-icons | 12,190 |
| 6 | HyperUI | 12,118 |
| 7 | Milligram | 10,224 |
| 8 | vcard-personal-portfolio | 7,856 |
| 9 | BOOTSTRA.386 | 6,866 |
| 10 | Charts.css | 6,566 |
| 11 | Tufte CSS | 6,460 |
| 12 | preline | 6,333 |
| 13 | open-props | 5,398 |
| 14 | mvp | 5,131 |
| 15 | css-reference | 4,914 |
| 16 | sakura | 4,376 |
| 17 | pattern.css | 3,924 |
| 18 | suit | 3,789 |
| 19 | Dopefolio | 3,700 |
| 20 | modern-font-stacks | 3,472 |
| 21 | latex-css | 3,451 |
| 22 | bulma-templates | 3,331 |
| 23 | the-monospace-web | 3,145 |
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