Email Address OSINT
Email Finder
Find email addresses in seconds • Hunter (Email Hunter)
GitHub - laramies/theHarvester: E-mails, subdomains and names Harvester - OSINT
Email Validator
Free Email Address Verifier: Verify An Email Address In Real Time | emailhippo.com
Email Checker - Verify Email Address Online
Login/Password Reset Prompts can also reveal sensitive information
Breach Data Search
Subdomain OSINT
GitHub - projectdiscovery/subfinder: Fast passive subdomain enumeration tool.
GitHub - guelfoweb/knock: Knock Subdomain Scan
GitHub - owasp-amass/amass: In-depth Attack Surface Mapping and Asset Discovery
GitHub - laramies/theHarvester: E-mails, subdomains and names Harvester - OSINT
Used to Probe Domains to check if they are Live
GitHub - tomnomnom/httprobe: Probe for working HTTP and HTTPS servers
Website OSINT
Find out what websites are built with - Wappalyzer
WhatWeb: CLI Tool