Everything I'd send you, in one place

GitHub Resources and Guides

GitHub's free article library explaining version control, DevOps, CI/CD, security practices and AI-assisted development in plain terms.

From the site: GitHub is where people build software. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects.

Why I recommend it: Good plain-English explainers for the terms that show up in job descriptions — read the DevOps and CI/CD ones before an interview.

React Documentation

The official free React docs, including the interactive "Learn React" course that teaches components, state and hooks from scratch with in-browser exercises.

From the site: React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations.

Why I recommend it: If you want to build web interfaces, start with the official tutorial rather than a paid bootcamp — it is free and better maintained.

Build a Chrome Extension: Getting Started

Google's free step-by-step tutorials for building and publishing a browser extension, from a first "hello world" to using storage, scripting and the side panel.

From the site: All the basics to get started with Chrome extensions

Why I recommend it: A small extension is one of the fastest portfolio projects you can actually finish and show someone.

Corsair Explorer Build Guides

Free guides explaining PC components — memory, power supplies, cooling, cases — and how to choose and assemble them for a first build.

Why I recommend it: Free and clear on how the parts fit together; it is a manufacturer's site, so compare prices and specs elsewhere before buying.

XDA Developers

Free hands-on technology journalism and tutorials — AI coding tool comparisons, self-hosting guides, Linux walkthroughs and hardware how-tos.

Why I recommend it: Their side-by-side tool tests are practical; good place to see whether a tool is worth your time before you install it.

The Linux Kernel Archives

The official source for the Linux kernel, including release archives, the full kernel documentation and guides for submitting your first patch.

Why I recommend it: If you want to contribute to real open-source infrastructure, the newbies documentation here is the actual front door.

Its FOSS Resources

Free downloadable guides, cheat sheets and ebooks on Linux, the command line and open-source software from the It's FOSS team.

Why I recommend it: Good beginner-friendly Linux material — the cheat sheets are worth keeping open while you practise.

Opensource.com

Free articles, tutorials and downloadable guides on open-source tools, Linux, containers and community-run projects, written by practitioners.

Why I recommend it: A good habit read — practical how-tos rather than product marketing.

AWS Whitepapers and Guides

Free technical whitepapers, reference architectures and best-practice guides on cloud architecture, security, machine learning and cost optimisation.

Why I recommend it: Free and deep — the well-architected guides are what cloud interviews are drawn from.

Cohere LLM University

A free course on large language models covering embeddings, retrieval-augmented generation, prompt design and deployment, with runnable notebooks.

Why I recommend it: Free, hands-on and vendor-neutral enough to transfer — a solid way to get real LLM skills on your resume.