- DNSdumpster Find dns records in order to identify the Internet footprint of an organization
- Robtex Domain/IP Lookup
- Virustotal Analyze suspicious files and URLs to detect types of malware, automatically share them with the security community.
- crt.sh Enter an Identity (Domain Name, Organization Name, etc),
a Certificate Fingerprint (SHA-1 or SHA-256)
- Threatminer Data mining for threat intelligence
- Dig Web Interface
- Dnslytics See detailed information about every IP address, domain name and provider.
- Research domaintools whois lookup
- Search Web by Domain
- Hybrid-analysis This is a free malware analysis service for the community that detects and analyzes unknown threats using a unique Hybrid Analysis technology.
- Shodan search engine for Internet-connected devices
- censys Find and analyze every reachable server and device on the Internet.
- pipl is a stalking online tool
- DataSploit An OSINT Framework to perform various recon techniques on Companies, People, Phone Number, Bitcoin Addresses, etc., aggregate all the raw data, and give data in multiple formats.
- Usersearch find the person behind a username, email address or phone number.
- Email hunter lets you find email addresses in seconds and connect with the people that matter for your business.
- Gravatar find peoples from their avatar
- Cymon is a tracker of malware, phishing, botnets, spam, and more.