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.

Cours Perl, AdminSys et Apache & NGINX en français par Luc Didry

Tutorials notebooks for data science

The playground allows you to learn about systemd interactively, right from your browser! Create examples without the danger of breaking your system, and without being distracted by hundreds of unrelated unit files.

Une école de développeurs web au service de votre réussite

Create GUI applications with Python and Qt.
Create professional user-interfaces for your Python apps.
Stop searching for how to create GUI applications with Python — it's all here. I've been teaching Python & Qt for 8 years, helping thousands of developers just like you to bring their apps to life. Let's make your project a success!

Free Online Courses by Harvard, MIT, & more

Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.

IDE, Editor, Compiler, Interpreter

Python IDE for beginners

Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems.

Learn to use VS Code like a pro.

Master VS Code will help you quickly improve your software development productivity and have more fun while coding.

Exercices d’algorithmique basés sur Scratch

Let's switch roles: this time YOU are the computer !

Courses designed by experts with real-world practice. Join our global community. It's free.

Learn the skills you need to help land the career you want

Technology is changing the world in remarkable ways and creating opportunity for people who have the skills that are in highest demand. The Microsoft Professional Program was created to help people gain these technical skills and get real-world experience through a series of online courses that feature hands-on labs and expert instructors. Learning these skills – and proving you have them – could put you on the path to a rewarding career.