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GuideBuildingJuly 20, 2026

4 Free Tools That Teach You How Software Actually Ships

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A guide to the four free resources that teach production software skills: GitHub RealWorld for real code structure, Killercoda for browser-based Docker, Kubernetes by Example for hands-on manifests, and GitHub Actions for CI/CD.

What's inside
  • GitHub RealWorld: the same production app in dozens of stacks
  • Killercoda: real Docker in your browser, zero installs
  • Kubernetes by Example: runnable manifests instead of docs grind
  • GitHub Actions: the build-test-deploy loop on every push
  • All four resources completely free

From "Runs on My Machine" to Production

Personal projects never show you Docker, Kubernetes, or CI/CD. A real company hits you with containers, clusters, and pipelines on day one. These four free resources close the gap.

The Production Toolkit

GitHub RealWorld: the same production app built in React, Vue, Angular, and dozens more against one shared spec, so you can compare how real teams structure identical features. Killercoda: a free browser-based Linux sandbox for learning Docker with zero installs. Kubernetes by Example: deployments, scaling, and pods as short runnable manifests instead of hundreds of pages of docs. And GitHub Actions: the free CI/CD loop behind how modern software actually ships.

What's in the Guide

What each resource teaches, why it beats the toy-project version of learning, and the links to start with all four — every one of them free.

The full breakdown is in the PDF.

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