OWASP Security Knowledge Framework - The OWASP Security Knowledge Framework is an open source web application that explains secure coding principles in multiple programming languages.
OSINT framework is focused on gathering information from free tools or resources. The intention is to help people find free OSINT resources.
MITRE ATT&CK® is a globally-accessible knowledge base of adversary tactics and techniques based on real-world observations
MITRE Engage™ is a framework for planning and discussing adversary engagement operations that empowers you to engage your adversaries and achieve your cybersecurity goals.
MITRE D3FEND™ A knowledge graph of cybersecurity countermeasures
MITRE CALDERA™ is a cybersecurity framework developed by MITRE that empowers cyber practitioners to save time, money, and energy through automated security assessments.
IS-ISAC The IT-ISAC is a non-profit corporation formed by IT companies as a specialized forum for managing risks to their corporations and the IT infrastructure.
FS-ISAC The Financial Services Information Sharing and Analysis Center
ISACA Information Systems Audit and Control Association, Inc.
FFIEC IT Exam Handbook
IT ISAC
FS ISAC
Cybersecurity News Feeds - Top Threat Feeds
Cybersecurity Reports
Red Canary Threat Detection Report
Dell Secureworks Threat Intelligence Report
Crowdstrike Global Threat Report