1. OSS Insight  – https://ossinsight.io/

2. Vulners – https://vulners.com/

3. Virus Total – https://www.virustotal.com/gui/home/upload

4. Webcheck – https://web-check.as93.net/

5. Threatable – https://www.threatable.io/

6. Pulsedive – https://pulsedive.com/

7. Thai Cert Threat Group Cards – https://apt.etda.or.th/cgi-bin/listgroups.cgi

8. CIA World Factbook – https://www.cia.gov/the-world-factbook/

9. SOC CMM – https://www.soc-cmm.com/

10. Shodan – https://www.shodan.io/

11. Security List – https://security-list.js.org/#/

12. Proofpoint Emerging Threat Rules – https://rules.emergingthreats.net/

13. OSINT UTOPIA – https://start.me/p/7kzDqv/osint-utopia-category

14. Opensource GRC – https://www.opensourcegrc.org/

15. NIST AI RMF – https://airc.nist.gov/AI_RMF_Knowledge_Base/AI_RMF

16. MITRE ATT&CK – https://attack.mitre.org/versions/v13/

17. APT Profiler – https://www.icsadvisoryproject.com/ics-advisory-dashboards/apt-profiler-v2

18. GreyNoise Visualizer – https://viz.greynoise.io/

19. CFR Global Conflict Tracker – https://www.cfr.org/global-conflict-tracker

20. GDACS Global Disaster Alert and Coordination System – https://vosocc.unocha.org/

21. Cyber Book of Knowledge – https://www.cybok.org/

22. CriminalIP – https://www.criminalip.io/en

23. Cyber Threat Intel – Start.me – https://start.me/p/wMrA5z/cyber-threat-intelligence

24. CFR – Cyber Operations Tracker – https://www.cfr.org/cyber-operations/

25. MITRE CTI Blueprints – https://mitre-engenuity.org/cybersecurity/center-for-threat-informed-defense/our-work/cti-blueprints/

26. Crypto Blockchain OSINT – https://start.me/p/4KNrlb/crypto-blockchain-osint

27. Crowdstrike Adversaries – https://www.crowdstrike.com/adversaries/

28. Common Controls Hub – https://commoncontrolshub.com/

29. CIS Critical Security Controls – https://www.cisecurity.org/controls/v8#companion-guides-v8

30. CERT EU Map – https://media.cert.europa.eu/BigScreenMap/

31. Censys GPT – https://gpt.censys.io/

32. APT Open IOC – https://github.com/dfir-ronin/APT-OpenIOC-Detection-Rules/tree/main

33. LiveUAMap – https://liveuamap.com/

34. Offsec Tools – 

35. Unprotect It – Evasion Techniques – https://unprotect.it/

36. The SOC Analyst Arsenal – https://secops.institute/the-soc-analyst-arsenal

37. Cyber Security Framework (NIST) – https://csrc.nist.gov/Projects/cybersecurity-framework/Filters#/csf/filters

38. Significant Cyber Incidents – https://www.csis.org/programs/strategic-technologies-program/significant-cyber-incidents

39. SOC RADAR – Open Source Threat Intel Feeds – https://socradar.io/the-ultimate-list-of-free-and-open-source-threat-intelligence-feeds/

40. URLScan – https://urlscan.io/

41. AnyRun – Interactive Malware Sandbox – https://any.run/

42. Red Teaming Toolkit – https://github.com/infosecn1nja/Red-Teaming-Toolkit

43. Awesome Hacker Search Engines – https://github.com/edoardottt/awesome-hacker-search-engines