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Top 23 CSS Html5 Projects
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freebies
Source code for Uisual templates. Free HTML/CSS landing page templates for startups. New template every week.
Project mention: Ask HN: Freelancer? Seeking freelancer? (October 2025) | news.ycombinator.com | 2025-10-01 -
Landings
A set of Bootstrap & Tailwind based website templates ready to be used to create stunning websites.
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vanilla-css-design-system
Purely Vanilla: A Minimalist CSS Design System (no SCSS or JavaScript needed)
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techui-toolkit
TechUI-Toolkit is a convenient tool library formed by extracting some components and functions from the TechUI core library.
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NextGenCSS-
A flexible and fast utility-first CSS framework with Customizable Syntax , made for big teams and for consistent naming conventions in CSS with SASS
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Profile-Card-Generator
A Profile Card Generator for generating profile cards to display on websites.
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quotes-generator-react
It is a simple Quotes Generator Web Application built using ReactJS and Quotes API.
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twitter_streaming_app_on_openshift_OCS
A Demo Twitter Streaming and Sentiment Analysis App to showcase RHT AMQ Streams (Kafka), MongoDB served through Python backend API and Javascript Frontend . This app runs on OpenShift and enjoys persistency using OpenShift Container Storage (rook-ceph)
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web-starter
Starter for Fastify + Web Components/Lit Web App. Includes Reload and web server restart on dev mode.
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Digital-Clock
A simple and stylish digital clock application built using HTML, CSS, and JavaScript. This project displays the current time dynamically and updates every second, providing a sleek and interactive user experience. (by Safdar-Ali-India)
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).
CSS Html5 discussion
CSS Html5 related posts
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Vanilla CSS Design System
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Show HN: Uisual – Free Tailwind CSS Components and Templates (No JavaScript)
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Open-Source Low-Latency Accelerated WebRTC HTML5 Remote Desktop Streaming
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Good Projects to Add to A Portfolio
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From an article about "side hustles" that pay 100k+ published by CNBC......aka jobs
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I made 40+ ready to use templates for any industry
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30 Free HTML Bootstrap Landing Page Templates for education, real estate, apps, and more.
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A note from our sponsor - SaaSHub
www.saashub.com | 10 Jun 2026
Index
What are some of the best open-source Html5 projects in CSS? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | CrookedStyleSheets | 3,277 |
| 2 | slim.js | 1,036 |
| 3 | ar5iv | 856 |
| 4 | freebies | 461 |
| 5 | Landings | 119 |
| 6 | Personal-Portfolio | 110 |
| 7 | vanilla-css-design-system | 42 |
| 8 | techui-toolkit | 19 |
| 9 | NextGenCSS- | 17 |
| 10 | portofolio-template-flowbite | 16 |
| 11 | Profile-Card-Generator | 10 |
| 12 | web-dev-practice | 9 |
| 13 | quotes-generator-react | 7 |
| 14 | twitter_streaming_app_on_openshift_OCS | 4 |
| 15 | Hacker_Man | 4 |
| 16 | phaser3-docs | 4 |
| 17 | tailwindStarter | 3 |
| 18 | github-login-page | 3 |
| 19 | picture-element | 2 |
| 20 | portfolio-page-stack | 1 |
| 21 | web-starter | 1 |
| 22 | yoga-landing-page | 1 |
| 23 | Digital-Clock | 1 |
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