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

Challenge the industry with us 🌟 Mechanical keyboards, modding, esports & more! Join our Discord community!

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

Linux, Python, JavaScript, coding challenges, golfing contests, and much more brought to you by Engineer Man.

A hub for AI security researchers and red teamers to compete in cutting-edge jailbreaking challenges, collaborate on AI safety, and win serious prizes testing real frontier models.

Welcome to a diverse community of over 5.000 members! We are a home for creative minds and survivalists alike. From hosting active lobbies in Terraria and Factorio to solving complex programming challenges, we do it all. Come share your projects, find a squad, and level up with us!

The PowerShell virtual user group is a place to get help, discuss scripts, challenge each other and socialize.

Welcome to the Discord community of Fotor AI! This is your go-to place for creative inspiration and AIGC challenge!

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!

Learn hacking by actually hacking. 20+ free CTF labs, weekly challenges, and a friendly community @whoamitang.

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

Climate change is one of humanity's greatest challenges. ReduceCO2Now brings together people worldwide to understand the science, discuss practical solutions, and take action to reduce atmospheric CO₂. Learn, collaborate, and help build a sustainable future.