Amass
OWASP project for in-depth attack surface mapping and subdomain enumeration.
FOCA
Extracts metadata from public documents to reveal users and software.
GitHub Code Search
Searching public code often reveals leaked keys, emails and infrastructure.
Gitleaks
Scans repositories for hardcoded secrets.
Google Dorks (GHDB)
Google Hacking Database of search operators that surface exposed data.
Metagoofil
Finds and downloads public documents from a domain for metadata analysis.
Photon
Fast crawler that extracts URLs, emails and files from a site.
Recon-ng
Modular recon framework with a Metasploit-style console; good for repeatable, scripted investigations.
SpiderFoot
Automated OSINT scanner with 200+ modules for footprinting domains, IPs and names. The open-source version runs locally.
Subfinder
Fast passive subdomain discovery tool that pulls from dozens of public sources.
theHarvester
Classic command-line tool for gathering emails, subdomains and hosts from public sources during early recon.
TruffleHog
Finds leaked secrets and credentials in git repos and other sources.