A hand-curated, license-aware map of the best free cybersecurity tools — from pentesting and bug bounty to OSINT, threat intel, DFIR, DevSecOps and AI/LLM security. Free, open-source and free-tier entries all earn their place.
Every realm is a deep-researched, link-verified chapter with its own PDF dossier — every tool license-checked, actively-maintained or a historically-notable classic.
Every realm ships as a designed, printable PDF dossier — census-synced with live GitHub API stats, license mix, and the full curated inventory. Free forever, CC0.
The Heaven list is curated by the team behind two open-source scanning engines — deterministic verdicts, self-hosted, zero AI guesswork.
What the list is, how tools get in, and how to use it well.