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✅1. Threat Intelligience 101 >> https://lnkd.in/gfpd__xz

✅2. URL, IP, domain, file hash >> https://lnkd.in/gNqxtn4d

✅3. URL Sandbox >> https://urlscan.io/

✅4. Cisco Reputation Check >> https://lnkd.in/g7uWdC5q

✅5. Diagnostic & lookup tools >> https://mxtoolbox.com/

✅6. Open Source IPS >> https://www.snort.org/

✅7. CyberChef >> https://lnkd.in/gVjZywKu

✅8. Browser Sandbox>> https://lnkd.in/gjA-QqdX

✅9. IBM Reputation Check >> https://lnkd.in/gt8iyHE5

✅10. IP Reputation Check >>https://www.abuseipdb.com/

✅11. Sandboxing >> https://any.run/

✅12. URL Category Finder >> https://lnkd.in/g4qQGsHG

✅13. Advance Online Utilities >> https://centralops.net/co/

✅14. Protocol analyzer >> https://www.wireshark.org/

✅15. DNS related tools >> https://viewdns.info/

✅16. OSINT Framework >> https://lnkd.in/gXaz_Wry

✅17. Malfrat's OSINT >> https://lnkd.in/e4nhK2hK

✅18. OpenAI >> https://lnkd.in/gjq7tcMG

✅19. Find Emails >> https://hunter.io/

✅20. Find People >> https://lnkd.in/g4bcUH_b

✅21. Secure Password? >> https://lnkd.in/gbRCEmRW

✅22. Internet Archieve >> https://archive.org/web/

✅23. Reverse Image search >> https://tineye.com

✅24. Link and data mining >>https://lnkd.in/gf9BUFWk

✅25. Data breaches >> https://lnkd.in/gvbzhceV

✅26. Search Engine for IoTs>> https://www.shodan.io/

✅27. Cyberspace Search >> https://www.zoomeye.org/

✅28. Search Engine >> https://search.censys.io/

✅29. Website Profiler Tool >>https://builtwith.com/

✅30. Malware Samples and IoCs >> https://abuse.ch/

✅31. WhatsMyName >> https://whatsmyname.app/

✅32. Email Info >>https://epieos.com/

✅33. File Search engine >> https://filepursuit.com/

✅34. Domain investigation >> https://lnkd.in/e2c27zc7

✅35. CyberGordon >> https://cybergordon.com/

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* Credit goes to Harun Seker for creating this list of resources!