H4cker

H4cker is a GitHub repository, not a product. Curated by Omar Santos, it indexes thousands of cybersecurity references, scripts, tools, labs, and training material under an MIT license. There's nothing to install and no dashboard to log into — you land on the domain folder that matches your goal and follow links out to the tools, labs, and references themselves. The taxonomy does the heavy lifting. The cybersecurity-domains folder spans fundamentals, offensive security, defensive security, application security, cloud and container security, infrastructure and network security, cryptography and PKI, hardware and embedded security, governance/risk/compliance, and labs/practice. Separate root folders cover ai (AI security, LLM engineering, AI-assisted incident response, AI ethics/privacy/governance), certifications (roadmaps plus Cisco SCOR, cloud, Kubernetes/CNCF, CompTIA, ISC2, and offensive security exam references), build-your-own-lab, threat_hunting, and training-reference. The code isn't decorative. The repo runs mostly on Jupyter Notebook (71.2%) and Python (24.1%), with Shell, Java, C, and some JavaScript alongside. merge_tools.py and a lychee.toml link-checker config sit at the root to keep the index maintained. Recent commits added an isMalicious prompt-injection scanner to the prompt firewall and redaction sections, ScanMalware to DFIR Domain Analysis, cl0q to the threat-intelligence tools, and AiTM phishing and session hijacking forensics material in threat_hunting. It suits self-study learners, certification candidates, bug bounty hunters, and security researchers who want one curated starting point instead of 40 scattered browser bookmarks. Against Hack The Box or TryHackMe, the difference is category: those sell graded lab environments, H4cker is a reference layer that points at them.