TryHackMe is a free online platform to learn cyber security through hands-on labs and exercises, accessible entirely in your browser—perfect for all skill levels.

HTB is the leading Cybersecurity Performance Center for advanced frontline teams to aspiring security professionals & students. Start driving peak cyber performance.

Hacking Articles is a comprehensive and insightful platform for learning about cyber security. It offers a wide range of articles and tutorials covering topics such as Penetration Testing, Bug Bounty, Red Teaming, Threat Hunting, and more.

hackthissite.org is a free, safe and legal training ground for hackers to test and expand their ethical hacking skills with challenges, ctfs, and more.

since 1983, developing the free unix style operating system gnu, so that computer users can have the freedom to share and improve the software they use.

Der Chaos Computer Club ist eine galaktische Gemeinschaft von Lebewesen für Informationsfreiheit und Technikfolgenabschätzung.

autistici/inventati provides internet support to activists and collectives coming from the world of grassroot and social movements

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms.

debian is an operating system and a distribution of free software. it is maintained and updated through the work of many users who volunteer their time and effort.

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