Lynis - Security auditing tool for Linux, macOS, and UNIX-based systems. Assists with compliance testing (HIPAA/ISO27001/PCI DSS) and system hardening. Agentless, and installation optional.

Prowler is an Open Source Security tool for AWS, Azure, GCP and Kubernetes to do security assessments, audits, incident response, compliance, continuous monitoring, hardening and forensics readiness. Includes CIS, NIST 800, NIST CSF, CISA, FedRAMP, PCI-DSS, GDPR, HIPAA, FFIEC, SOC2, GXP, Well-Architected Security, ENS and more

Wazuh - The Open Source Security Platform. Unified XDR and SIEM protection for endpoints and cloud workloads.

Open Policy Agent (OPA) is an open source, general-purpose policy engine.

immudb - immutable database based on zero trust, SQL/Key-Value/Document model, tamperproof, data change history

Security scanner for your Terraform code

Prevent cloud misconfigurations and find vulnerabilities during build-time in infrastructure as code, container images and open source packages with Checkov by Bridgecrew.

Rules engine for cloud security, cost optimization, and governance, DSL in yaml for policies to query, filter, and take actions on resources

Open source cloud native security observability platform. Linux, K8s, AWS Fargate and more.

OSSEC is an Open Source Host-based Intrusion Detection System that performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.

InSpec: Auditing and Testing Framework

HardeningKitty and Windows Hardening settings and configurations

Security automation content in SCAP, Bash, Ansible, and other formats

Open-source infrastructure and data orchestration platform for risk decisioning

A FAST Kubernetes manifests validator, with support for Custom Resources!

HummerRisk 是云原生安全平台，包括混合云安全治理和云原生安全检测。

Code security scanning tool (SAST) to discover, filter and prioritize security and privacy risks.

macOS Security Compliance Project

Configuration guidance for implementing the Windows 10 and Windows Server 2016 DoD Secure Host Baseline settings. #nsacyber

A suite of tools to automate software compliance checks.