an open source HTML5 + CSS3 course

In plain words

An open source course teaching HTML5 and CSS3, launched in 2012. Designed for developers learning web markup and styling fundamentals, it provides freely available instructional materials covering these core web technologies. The course emphasizes practical knowledge of modern HTML and CSS standards, making it accessible to anyone interested in web development without cost barriers.

written from the facts on this page · September 2026

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  HTML for People2024 · htmlforpeople.com · ▲677

  HTML isn't only for people working in the tech field. It's for everyone. Learn how to make a website from scratch in this beginner friendly web book.

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  Scratchpad.io - a real-time HTML and CSS editor2012 · scratchpad.io · ▲298

  Dash is a fun and free online course from General Assembly that teaches you how to program with the basics of web development through projects you can do right in your browser. Get started today!

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  MarkSheet.io – a free guide to learn HTML and CSS2015 · marksheet.io · ▲16

  MarkSheet is a free tutorial to learn HTML and CSS. It

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  Divize2023 · divize.io · ▲117

  Learn, write, master HTML/CSS through real UI challenges

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  CSS GUI2022 · cssgui.com · ▲72

  Create CSS without code by an open source tool

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  Learn React and D3 in the browser with runnable code playgrounds2017 · educative.io · ▲48

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  /dev/null▲481

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

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  Talanoa▲341

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

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  Soundslice – YouTube + synced guitar tabs + HTML5▲492

  Learn music better with our living sheet music.

  Life & fun · 2012 · soundslice.com

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  Non-Confusing, Visually Correct Slider Toggle UI▲441

  Life & fun · 2012 · chrisnorstrom.com

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  Instant Google Street View▲412

  Instantly see a Google Street View of any supported location. Easily share and save your favourite views.

  Life & fun · 2012 · qsview.com

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  An IDE for poets▲398

  Life & fun · 2012 · tranquillpoet.com

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  I'm 14, I learned Objective-C, and this is my first iPhone game▲386

  The latest macOS offers the world’s best way to play — and add to — your collection of music, movies, TV shows, podcasts, audiobooks, and more.

  Life & fun · 2012 · itunes.apple.com

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  Responsive Email Templates▲310

  Ensure your email campaigns look good on any device with our responsive email templates.

  Life & fun · 2012 · zurb.com