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Get started with hacking in the academy, test your skills against boxes and challenges or chat about infosec with others

Your spot for hands-on cybersecurity, red teaming, ethical hacking, and nonstop CTF action. Learn to think like an attacker, sharpen your skills, and grow with a community that actually gets it. Jump in and earn your OvO tag.

Microsoft Student Community to share ideas, solve challenges, build solutions, and develop technical skills.

The official Discord server of W3Schools! Come hang out, learn to code, and level up your skills with other developers. Whether you’re just starting out, trying to break into a tech job, or looking to grow in your current career. This is the place to learn, connect, and get inspired.

A community of developers helping each other improve their coding skills by building projects and giving feedback.

HackThisSite is a free, safe and legal training ground for hackers to test and expand their ethical hacking skills.

CyberDefenders is a cyber defense training platform offering blue teamers a place to practice and build skills.

A welcoming community for C++ developers of all experience levels. Whether you're just starting out, improving your skills, working on complex projects, or exploring advanced topics, this is a place to ask questions, share knowledge, and discuss everything related to C++.

Connect with other game developers to progress your career and game development skills with the IGDA!

Join thousands of flight simulation enthusiasts to learn, share, improve your skills, and stay up to date with everything happening at Navigraph.

A community centered about The Daily Integral website, focused on daily calculus and problem-solving challenges. Join to discuss mathematics, ask questions, and improve your integration skills in a friendly and active environment!

Beginner friendly coding community for LeetCode, Data Structures & Algorithms (DSA), System Design, and Software Engineering interview preparation. Improve real problem-solving skills with coding challenges in Python, Javascript, Java, Rust, C++, C or any programming language. Open-Source Initiative