💯 Curated coding interview preparation materials for busy software engineers
Not everyone has the time to do a few hundred LeetCode questions. Here are free and curated technical interview preparation materials for busy engineers, brought to you by me, the author of Blind 75. Over 500,000 people have benefitted from this handbook!

This site is a collection of examples, video and other information to help you learn CSS Grid Layout.

The voice app for sharing knowledge
Historians, entrepreneurs, futurists, scientists...find your favorite thinkers.

Curated list of programming languages tutorials

Projectbook is a collection of over 100 software project ideas for people looking to learn a given language or technology but short on inspiration for what to build. The projects vary in complexity and what they exercise. Find inspiration for your next project.

100% free and interactive Python course for beginners.
This is a 100% free and interactive course for people to teach themselves programming in Python, especially complete beginners at programming. It is carefully designed to reduce frustration and guide the user while still ensuring that they learn how to solve problems. The goal is for as many people as possible to learn programming.

A free guide to all HTML elements and attributes.

CSS shapes examples, click to copy.

Find the best courses, wherever they exist.

Robocode is a programming game, where the goal is to develop a robot battle tank to battle against other tanks with Java. The robot battles are running in real-time and on-screen. The motto of Robocode is: Build the best, destroy the rest!

Laws of UX is a collection of best practices that designers can consider when building user interfaces.

La plateforme communautaire dédiée à l'OSINT.
Plateforme dédiée à la pratique de l'Osint.

Accessibility Myths debunked promotes accessibility for the web by correcting false beliefs.

Learn in-demand skills, build solutions with real sample code, and connect with a global community of developers

Learn Digital Skills with Free Training - Learn the skills of the future.

Accelerate your career or business with an online digital skills course in everything from marketing to coding and beyond.

Twitter feed recensing GitHub repositories to improve your programming skills.

Test your CSS Skills.

Enter the CSS selector, which applies to all elements with an arrow ➡️ and press enter or the submit button.

The timer will start once you correctly solved the first puzzle.

WebGoat is a deliberately insecure application that allows interested developers just like you to test vulnerabilities commonly found in Java-based applications that use common and popular open source components.

Welcome to RasPwn OS, The intentionally vulnerable image for the Raspberry Pi.

Raspwn OS is a GNU/Linux distro in the spirit of Damn Vulnerable Linux and uses a Raspberry Pi 2B or 3 to emulate a vulnerable Linux Server. RasPwn was designed as a training tool and exists only to be attacked and pwned. Everything from the OS itself to the daemons and services to the web applications installed are all vulnerable to some degree. The idea is to provide a 'safe' (relatively) and affordable training environment and playground for hackers and pen-testers. By loading Raspwn OS and connecting to the Raspberry Pi via WiFi, one can practice pen-testing as well as both offensive and defensive hacking techniques without ever even getting on the internet for only around $50.

a game to learn (or teach) how to use standard commands in a Unix shell.
Teaching first-year university students or high schoolers to use a Unix shell is not always the easiest or most entertaining of tasks. GameShell was devised as a tool to help students at the Université Savoie Mont Blanc to engage with a real shell, in a way that encourages learning while also having fun.