A collection of learning resources for curious software engineers

Instant Upgrades and Automated Refactoring of any PHP 5.3+ code

Home automation firmware for ESP8266-based devices

Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP…

A configurable server for mocking/stubbing external systems during development.

CLI package to create a Stubby data .json file based on a HAR file

Drupal 8 module - FREE live chat application.

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.

A composer plugin, to install differenty types of composer packages in custom directories outside the default composer default installation path which is in the vendor folder.

Run your GitHub Actions locally 🚀

GitHub action to set up PHP with extensions, php.ini configuration, coverage drivers, and various tools.

earlyoom - Early OOM Daemon for Linux

A little web app that helps you copy+paste syntax-highlighted code into slide decks.

Slevomat Coding Standard for PHP_CodeSniffer provides many useful sniffs

What happens behind the scenes when we type www.google.com in a browser?

Metarhia educational program index 📖

How to systematically secure anything: a repository about security engineering

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

Master the command line, in one page

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

A complete computer science study plan to become a software engineer.

📚 Freely available programming books

Master programming by recreating your favorite technologies from scratch.

JavaScript API for Chrome and Firefox

🧠 Laws, Theories, Principles and Patterns for developers and technologists.

Build your Chromium OS for Raspberry Pi 4B, Pi400 and the latest Raspberry Pi 5

⚡ Delightful Node.js packages and resources

CSS coding style formatter

A mighty CSS linter that helps you avoid errors and enforce conventions.

📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)