Everything

PythonBeginner robot

Add hours on a 24-hour clock

Do it hereCoding problems

JavaScriptBeginner robot

Add hours on a 24-hour clock

Do it hereCoding problems

PythonBeginner robot

Add in parts

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JavaScriptBeginner robot

Add in parts

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JavaScriptBeginner robot

Add two numbers

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JavaScriptBeginner robot

Add up a list

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PythonBeginner robot

All the factors

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JavaScriptBeginner robot

All the factors

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PythonBeginner robot

Binary card values

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JavaScriptBeginner robot

Binary card values

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PythonBeginner robot

Cards from the biggest down

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JavaScriptBeginner robot

Cards from the biggest down

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PythonBeginner robot

Count the even numbers

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PythonBeginner robot

Does it divide?

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JavaScriptBeginner robot

Does it divide?

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PythonBeginner robot

Double it

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JavaScriptBeginner robot

Find the biggest number

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PythonBeginner robot

Greet someone

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JavaScriptBeginner robot

Greet someone

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PythonBeginner robot

How many cards do I need?

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JavaScriptBeginner robot

How many cards do I need?

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PythonBeginner robot

Inside angle of a shape

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JavaScriptBeginner robot

Inside angle of a shape

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PythonBeginner robot

Is it even?

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PythonBeginner robot

Power of a number

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JavaScriptBeginner robot

Power of a number

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PythonBeginner robot

Say hello

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JavaScriptBeginner robot

Say hello

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PythonBeginner robot

Spot a parity error in a row

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JavaScriptBeginner robot

Spot a parity error in a row

Do it hereCoding problems

PythonIntermediate alien

Add a parity bit

Do it hereCoding problems

PythonIntermediate alien

Add hours on a 12-hour clock

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JavaScriptIntermediate alien

Add hours on a 12-hour clock

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PythonIntermediate alien

Barcode: the last digit

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JavaScriptIntermediate alien

Barcode: the last digit

Do it hereCoding problems

PythonIntermediate alien

Book code: the last digit

Do it hereCoding problems

JavaScriptIntermediate alien

Book code: the last digit

Do it hereCoding problems

PythonIntermediate alien

Count the dots on the cards

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JavaScriptIntermediate alien

Count the dots on the cards

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JavaScriptIntermediate alien

Count the vowels

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PythonIntermediate alien

Count the words

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JavaScriptIntermediate alien

Factorial

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PythonIntermediate alien

Fizz and Buzz

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PythonIntermediate alien

Is it a prime?

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JavaScriptIntermediate alien

Is it a prime?

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PythonIntermediate alien

Leap years

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JavaScriptIntermediate alien

Leap years

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PythonIntermediate alien

Months later

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JavaScriptIntermediate alien

Months later

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PythonIntermediate alien

Name the music note

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JavaScriptIntermediate alien

Name the music note

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PythonIntermediate alien

Palindromes

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PythonIntermediate alien

Prime factors

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JavaScriptIntermediate alien

Prime factors

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PythonIntermediate alien

Reverse the words

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PythonIntermediate alien

Show a number with five cards

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JavaScriptIntermediate alien

Show a number with five cards

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JavaScriptIntermediate alien

Sort a list by hand

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JavaScriptIntermediate alien

Turn text around

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PythonAdvanced astronaut

Add two video lengths

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JavaScriptAdvanced astronaut

Add two video lengths

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JavaScriptAdvanced astronaut

Binary search

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PythonAdvanced astronaut

Card number: the last digit

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JavaScriptAdvanced astronaut

Card number: the last digit

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PythonAdvanced astronaut

Check any barcode

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JavaScriptAdvanced astronaut

Check any barcode

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JavaScriptAdvanced astronaut

Fibonacci, fast

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PythonAdvanced astronaut

Find the flipped card

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JavaScriptAdvanced astronaut

Find the flipped card

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PythonAdvanced astronaut

Find the prime numbers

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PythonAdvanced astronaut

Flatten a list

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PythonAdvanced astronaut

Is this book code real?

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JavaScriptAdvanced astronaut

Is this book code real?

Do it hereCoding problems

PythonAdvanced astronaut

Is this card number possible?

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JavaScriptAdvanced astronaut

Is this card number possible?

Do it hereCoding problems

PythonAdvanced astronaut

Write a number in binary

Do it hereCoding problems

Programming languages Beginner robot

How binary digits work: programming challenges

Difficulty 1/5 On other sites Screen-free lesson

Programming challenges (Scratch, Python or blocks) to go with the 'How binary digits work' lesson, from the 'Binary numbers' unit. Best done with a grown-up.

Programming languages Beginner robot

Parity magic: programming challenges

Difficulty 1/5 On other sites Screen-free lesson

Programming challenges (Scratch, Python or blocks) to go with the 'Parity magic' lesson, from the 'Error detection and correction' unit. Best done with a grown-up.

Programming languages Beginner robot

Product code check digits: programming challenges

Difficulty 1/5 On other sites Screen-free lesson

Programming challenges (Scratch, Python or blocks) to go with the 'Product code check digits' lesson, from the 'Error detection and correction' unit. Best done with a grown-up.

Programming languages Beginner robot

Sending a rocket to Mars: programming challenges

Difficulty 1/5 On other sites Screen-free lesson

Programming challenges (Scratch, Python or blocks) to go with the 'Sending a rocket to Mars' lesson, from the 'Kidbots' unit. Best done with a grown-up.

Programming languages Beginner robot

The Modulo operator Unplugged: programming challenges

Difficulty 1/5 On other sites Screen-free lesson

Programming challenges (Scratch, Python or blocks) to go with the 'The Modulo operator Unplugged' lesson, from the 'Kidbots' unit. Best done with a grown-up.

Programming languages Beginner robot

2D breakout game using Phaser

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

30 Seconds of Code

Difficulty 2/5 On other sites Resource list

Code snippets you can understand in 30 seconds.

Programming languages Beginner robot

A Simple Web Server

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

Adventures in Rust: A Basic 2D Game

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

Build a simple 2D physics engine for JavaScript games

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

Code a 2D Game Engine using Java - Full Course for Beginners

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

CSS Learning

Difficulty 2/5 On other sites Resource list

Mainly about CSS – the language and the modules.

Programming languages Beginner robot

From NAND to Tetris: Building a Modern Computer From First Principles

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

How To: Augmented Reality App Tutorial for Beginners with Vuforia and Unity 3D

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

Hydrogen

Difficulty 2/5 On other sites Resource list

Edge-first framework for building Shopify storefronts with React.

Programming languages Beginner robot

Introduction to Ray Tracing: a Simple Method for Creating 3D Images

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

JavaScript Learning

Difficulty 2/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

jQuery

Difficulty 2/5 On other sites Resource list

Easy to use JavaScript library for DOM manipulation.

Programming languages Beginner robot

Make Your Own Simple Interpreted Programming Language

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

Offline-First

Difficulty 2/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

Tailwind CSS

Difficulty 2/5 On other sites Resource list

Utility-first CSS framework for rapid UI development.

Programming languages Beginner robot

Think like a programmer: How to build Snake using only JavaScript, HTML & CSS

Difficulty 2/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Beginner robot

V

Difficulty 2/5 On other sites Resource list

Simple, fast, safe, compiled language for developing maintainable software.

Programming languages Beginner robot

VBA

Difficulty 2/5 On other sites Resource list

An event-driven version of Visual Basic 6.0 built into most Microsoft Office apps for automation and scripting.

Programming languages Beginner robot

Craft CMS

Difficulty 2/5 On other sites Resource list

Content-first CMS.

Programming languages Intermediate alien

Build your own 8-Ball Pool game from scratch

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Canvas

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

CSS

Difficulty 3/5 On other sites Resource list

Style sheet language that specifies how HTML elements are displayed on screen.

Programming languages Intermediate alien

Education

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Esolangs

Difficulty 3/5 On other sites Resource list

Programming languages designed for experimentation or as jokes rather than actual use.

Programming languages Intermediate alien

Flexbox

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

HTML5

Difficulty 3/5 On other sites Resource list

Markup language used for websites & web apps.

Programming languages Intermediate alien

Learning

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Learning

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Lua

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Playgrounds

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Python

Difficulty 3/5 On other sites Resource list

General-purpose programming language designed for readability.

Programming languages Intermediate alien

SVG

Difficulty 3/5 On other sites Resource list

XML-based vector image format.

Programming languages Intermediate alien

Web Accessibility

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Web Animation

Difficulty 3/5 On other sites Resource list

Animations in the browser with JavaScript, CSS, SVG, etc.

Programming languages Intermediate alien

Web Design

Difficulty 3/5 On other sites Resource list

For digital designers.

Programming languages Intermediate alien

A 3D Modeller

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

A DIY guide to build your own React

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

A Neural Network in 11 lines of Python

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

A Template Engine

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

ActionScript 3

Difficulty 3/5 On other sites Resource list

Object-oriented language targeting Adobe AIR.

Programming languages Intermediate alien

Amazon Web Services

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Android UI

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Angular

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

Ant Design

Difficulty 3/5 On other sites Resource list

Enterprise-class UI design language.

Programming languages Intermediate alien

Apache Wicket

Difficulty 3/5 On other sites Resource list

Java web app framework.

Programming languages Intermediate alien

AR Portal Tutorial with Unity

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Aurelia

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

AutoHotkey

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

AutoIt

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

AVA

Difficulty 3/5 On other sites Resource list

Test runner.

Programming languages Intermediate alien

Backbone

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

BEM

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Biological Visualizations

Difficulty 3/5 On other sites Resource list

Interactive visualization of biological data on the web.

Programming languages Intermediate alien

Blazor

Difficulty 3/5 On other sites Resource list

.NET web framework using C#/Razor and HTML that runs in the browser with WebAssembly.

Programming languages Intermediate alien

Browser Extensions

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Browserify

Difficulty 3/5 On other sites Resource list

Module bundler.

Programming languages Intermediate alien

Build your own 3D renderer

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Build Your Own Module Bundler - Minipack

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Building a frontend framework, from scratch, with components (templating, state, VDOM)

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Building A Python-Based Search Engine

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Building Blocks for Web Apps

Difficulty 3/5 On other sites Resource list

Standalone features to be integrated into web apps.

Programming languages Intermediate alien

C/C++

Difficulty 3/5 On other sites Resource list

General-purpose language with a bias toward system programming and embedded, resource-constrained software.

Programming languages Intermediate alien

CakePHP

Difficulty 3/5 On other sites Resource list

PHP framework.

Programming languages Intermediate alien

Capacitor

Difficulty 3/5 On other sites Resource list

Cross-platform open source runtime for building Web Native apps.

Programming languages Intermediate alien

Charting

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

choo

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

Chrome DevTools

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Clojure

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

CMake

Difficulty 3/5 On other sites Resource list

Build, test, and package software.

Programming languages Intermediate alien

Coding a Rogue/Nethack RPG in C

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Coding A Sudoku Solver in C

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

ColdFusion

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Composer

Difficulty 3/5 On other sites Resource list

Package manager.

Programming languages Intermediate alien

Continuous Integration System

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Cordova

Difficulty 3/5 On other sites Resource list

JavaScript API for hybrid apps.

Programming languages Intermediate alien

Critical-Path Tools

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Cross-Platform

Difficulty 3/5 On other sites Resource list

Writing cross-platform code on Node.js.

Programming languages Intermediate alien

D

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

D3

Difficulty 3/5 On other sites Resource list

Library for producing dynamic, interactive data visualizations.

Programming languages Intermediate alien

Dart

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Dash

Difficulty 3/5 On other sites Resource list

Python web app framework.

Programming languages Intermediate alien

Data Science

Difficulty 3/5 On other sites Resource list

Data analysis and machine learning.

Programming languages Intermediate alien

Deno

Difficulty 3/5 On other sites Resource list

A secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.

Programming languages Intermediate alien

Design and Development Guides

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Design systems

Difficulty 3/5 On other sites Resource list

Collection of reusable components, guided by rules that ensure consistency and speed.

Programming languages Intermediate alien

Dojo Toolkit

Difficulty 3/5 On other sites Resource list

JavaScript toolkit.

Programming languages Intermediate alien

Draft.js

Difficulty 3/5 On other sites Resource list

Rich text editor framework for React.

Programming languages Intermediate alien

Dropwizard

Difficulty 3/5 On other sites Resource list

Java framework.

Programming languages Intermediate alien

Drupal

Difficulty 3/5 On other sites Resource list

Extensible PHP-based CMS.

Programming languages Intermediate alien

Electron

Difficulty 3/5 On other sites Resource list

Cross-platform native desktop apps using JavaScript/HTML/CSS.

Programming languages Intermediate alien

Elixir

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Elm

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Emails

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Ember

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

ES6 Tools

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

ESLint

Difficulty 3/5 On other sites Resource list

Linter.

Programming languages Intermediate alien

F#

Difficulty 3/5 On other sites Resource list

A .NET-based language with focus on functional programming.

Programming languages Intermediate alien

FastAPI

Difficulty 3/5 On other sites Resource list

Python web app framework.

Programming languages Intermediate alien

Fiber

Difficulty 3/5 On other sites Resource list

Web framework built on top of Fasthttp, the fastest HTTP engine for Go.

Programming languages Intermediate alien

Flask

Difficulty 3/5 On other sites Resource list

Python framework.

Programming languages Intermediate alien

Framer

Difficulty 3/5 On other sites Resource list

Prototyping interactive UI designs.

Programming languages Intermediate alien

Frameworks

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Frontend Development

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Games With Go

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Go

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

GraphQL

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Gulp

Difficulty 3/5 On other sites Resource list

Task runner.

Programming languages Intermediate alien

How to Augmented Reality AR Tutorial: ARKit Portal to the Upside Down

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

How to create a Dragon in Augmented Reality in Unity ARCore

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

How to create a real-world Node CLI app with Node

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

How To Unity ARCore

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Hyper

Difficulty 3/5 On other sites Resource list

Cross-platform terminal app built on web technologies.

Programming languages Intermediate alien

Imba

Difficulty 3/5 On other sites Resource list

Programming language inspired by Ruby and Python and compiles to performant JavaScript.

Programming languages Intermediate alien

Inertia.js

Difficulty 3/5 On other sites Resource list

Make single-page apps without building an API.

Programming languages Intermediate alien

Inspiration

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Ionic Framework

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

iOS UI

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

J2ME

Difficulty 3/5 On other sites Resource list

Java specification designed for old keypad phones and PDAs..

Programming languages Intermediate alien

JAMstack

Difficulty 3/5 On other sites Resource list

Modern web development architecture based on client-side JavaScript, reusable APIs, and prebuilt markup.

Programming languages Intermediate alien

Java

Difficulty 3/5 On other sites Resource list

Popular secure object-oriented language designed for flexibility to "write once, run anywhere".

Programming languages Intermediate alien

JavaScript

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

JavaScript Algorithms and Data Structures

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

JSON Decoding Algorithm

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

KnockoutJS

Difficulty 3/5 On other sites Resource list

JavaScript library.

Programming languages Intermediate alien

Kotlin

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Laravel

Difficulty 3/5 On other sites Resource list

PHP framework.

Programming languages Intermediate alien

Learn how to write a hash table in C

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Learn Video Game Programming in C

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Less

Difficulty 3/5 On other sites Resource list

CSS preprocessor.

Programming languages Intermediate alien

Let's Make: Dangerous Dave

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

lets-build-express

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Lexical Scanning in Go

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

libGDX

Difficulty 3/5 On other sites Resource list

Java game framework.

Programming languages Intermediate alien

lit

Difficulty 3/5 On other sites Resource list

Library for building web components with a declarative template system.

Programming languages Intermediate alien

Lumen

Difficulty 3/5 On other sites Resource list

PHP micro-framework.

Programming languages Intermediate alien

Mad Science npm Packages

Difficulty 3/5 On other sites Resource list

Impossible sounding projects that exist.

Programming languages Intermediate alien

Magento 2

Difficulty 3/5 On other sites Resource list

Open Source eCommerce built with PHP.

Programming languages Intermediate alien

Maintenance Modules

Difficulty 3/5 On other sites Resource list

For npm packages.

Programming languages Intermediate alien

mal - Make a Lisp

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Marionette.js

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

Master CSS

Difficulty 3/5 On other sites Resource list

A virtual CSS language with enhanced syntax.

Programming languages Intermediate alien

Material Design

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Material-UI

Difficulty 3/5 On other sites Resource list

Material Design React components for faster and easier web development.

Programming languages Intermediate alien

MDBootstrap

Difficulty 3/5 On other sites Resource list

Templates, layouts, components, and widgets to rapidly build websites.

Programming languages Intermediate alien

Meteor

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Micro npm Packages

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Mobile Web Development

Difficulty 3/5 On other sites Resource list

Creating a great mobile web experience.

Programming languages Intermediate alien

Motion UI Design

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Must Watch Talks

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Must-Watch Talks

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Neural Networks - The Nature of Code

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Neural Networks: Zero to Hero

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Next.js

Difficulty 3/5 On other sites Resource list

Framework for server-rendered React apps.

Programming languages Intermediate alien

nginx

Difficulty 3/5 On other sites Resource list

Web server.

Programming languages Intermediate alien

Node.js

Difficulty 3/5 On other sites Resource list

Async non-blocking event-driven JavaScript runtime built on Chrome's V8 JavaScript engine.

Programming languages Intermediate alien

npm

Difficulty 3/5 On other sites Resource list

Package manager.

Programming languages Intermediate alien

npm scripts

Difficulty 3/5 On other sites Resource list

Task runner.

Programming languages Intermediate alien

PageSpeed Metrics

Difficulty 3/5 On other sites Resource list

Metrics to help understand page speed and user experience.

Programming languages Intermediate alien

Pascal

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Payload

Difficulty 3/5 On other sites Resource list

Next.js native and open source headless CMS.

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Perl

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Phalcon

Difficulty 3/5 On other sites Resource list

PHP framework.

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PHP

Difficulty 3/5 On other sites Resource list

Server-side scripting language.

Programming languages Intermediate alien

Play1 Framework

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Playwright

Difficulty 3/5 On other sites Resource list

Node.js library to automate Chromium, Firefox and WebKit with a single API.

Programming languages Intermediate alien

Plone

Difficulty 3/5 On other sites Resource list

Open source Python CMS.

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Polymer

Difficulty 3/5 On other sites Resource list

JavaScript library to develop Web Components.

Programming languages Intermediate alien

PostCSS

Difficulty 3/5 On other sites Resource list

CSS tool.

Programming languages Intermediate alien

Preact

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

Progressive Enhancement

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Progressive Web Apps

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Promises

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Protips

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Pyramid

Difficulty 3/5 On other sites Resource list

Python framework.

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Python Tutorial: Make Your Own Text Editor

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

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R

Difficulty 3/5 On other sites Resource list

Functional programming language and environment for statistical computing and graphics.

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Rails

Difficulty 3/5 On other sites Resource list

Web app framework for Ruby.

Programming languages Intermediate alien

Rasterization: a Practical Implementation

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

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React

Difficulty 3/5 On other sites Resource list

JavaScript library for building user interfaces.

Programming languages Intermediate alien

React Hooks

Difficulty 3/5 On other sites Resource list

Lets you use state and other React features without writing a class.

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React Native

Difficulty 3/5 On other sites Resource list

JavaScript framework for writing natively rendering mobile apps for iOS and Android.

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Redux

Difficulty 3/5 On other sites Resource list

State container for JavaScript apps.

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Refinery CMS

Difficulty 3/5 On other sites Resource list

Ruby on Rails CMS.

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Reflex

Difficulty 3/5 On other sites Resource list

Python web framework for building both your frontend and backend with no JavaScript.

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REST

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Roguelike Tutorial in Rust + tcod

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

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Ruby

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Rust

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

SAP Commerce

Difficulty 3/5 On other sites Resource list

An e-commerce platform built with Java, Spring MVC, and Angular.

Programming languages Intermediate alien

Sass

Difficulty 3/5 On other sites Resource list

CSS preprocessor.

Programming languages Intermediate alien

Scriptable

Difficulty 3/5 On other sites Resource list

An iOS app for automation in JavaScript.

Programming languages Intermediate alien

Search Engine Optimization

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Selenium

Difficulty 3/5 On other sites Resource list

Open-source browser automation framework and ecosystem.

Programming languages Intermediate alien

Silverstripe CMS

Difficulty 3/5 On other sites Resource list

PHP MVC framework that serves as a classic or headless CMS.

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Sitecore

Difficulty 3/5 On other sites Resource list

.NET digital marketing platform that combines CMS with tools for managing multiple websites.

Programming languages Intermediate alien

Slim

Difficulty 3/5 On other sites Resource list

PHP framework.

Programming languages Intermediate alien

Standard Style

Difficulty 3/5 On other sites Resource list

Style guide and linter.

Programming languages Intermediate alien

Static Website Services

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Storybook

Difficulty 3/5 On other sites Resource list

Development environment for UI components.

Programming languages Intermediate alien

Svelte

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

Swift

Difficulty 3/5 On other sites Resource list

Apple's compiled programming language that is secure, modern, programmer-friendly, and fast.

Programming languages Intermediate alien

Symfony

Difficulty 3/5 On other sites Resource list

PHP framework.

Programming languages Intermediate alien

Text Editing

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Textpattern

Difficulty 3/5 On other sites Resource list

Lightweight PHP-based CMS.

Programming languages Intermediate alien

Tiny JS

Difficulty 3/5 On other sites Resource list

Frontend libraries that fit into 2 kB with dependencies.

Programming languages Intermediate alien

Tiny Package Manager: Learns how npm or Yarn works

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Tips

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Tips

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Typing

Difficulty 3/5 On other sites Resource list

Optional static typing for Python.

Programming languages Intermediate alien

Umbraco

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Useful .htaccess Snippets

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Userscripts

Difficulty 3/5 On other sites Resource list

Enhance your browsing experience.

Programming languages Intermediate alien

Visual Regression Testing

Difficulty 3/5 On other sites Resource list

Ensures changes did not break the functionality or style.

Programming languages Intermediate alien

Vorpal

Difficulty 3/5 On other sites Resource list

Node.js CLI framework.

Programming languages Intermediate alien

Vue.js

Difficulty 3/5 On other sites Resource list

App framework.

Programming languages Intermediate alien

Wagtail

Difficulty 3/5 On other sites Resource list

Django CMS focused on flexibility and user experience.

Programming languages Intermediate alien

Web Archiving

Difficulty 3/5 On other sites Resource list

An effort to preserve the Web for future generations.

Programming languages Intermediate alien

Web Audio

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Web Performance Budget

Difficulty 3/5 On other sites Resource list

Techniques to ensure certain performance metrics for a website.

Programming languages Intermediate alien

Web Performance Optimization

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Web Tools

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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Web Typography

Difficulty 3/5 On other sites Resource list

A free resource picked by the open-source community. Open it to see what's inside.

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WebExtensions

Difficulty 3/5 On other sites Resource list

Cross-browser extension system.

Programming languages Intermediate alien

WebGL

Difficulty 3/5 On other sites Resource list

JavaScript API for rendering 3D graphics.

Programming languages Intermediate alien

WebXR

Difficulty 3/5 On other sites Resource list

Enables immersive virtual reality and augmented reality content on the web.

Programming languages Intermediate alien

WordPress-Gatsby

Difficulty 3/5 On other sites Resource list

Web development technology stack with WordPress as a back end and Gatsby as a front end.

Programming languages Intermediate alien

WP-CLI

Difficulty 3/5 On other sites Resource list

Command-line interface for WordPress.

Programming languages Intermediate alien

Write your own MVC from scratch in PHP

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Writing a Link Checker

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Writing a MiniTest Framework

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Intermediate alien

Writing a URL Shortening Service

Difficulty 3/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Advanced astronaut

3D Physics Engine Tutorial

Difficulty 5/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Advanced astronaut

A Large Language Model (LLM)

Difficulty 5/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.

Programming languages Advanced astronaut

A Python Interpreter Written in Python

Difficulty 5/5 On other sites Build project

A free resource picked by the open-source community. Open it to see what's inside.