- CrowdSec - community firewall/log prevention
- Wazuh - Endpoint scanning
- doomcaptcha - vivirenremoto
- Seconion - threat hunting, enterprise security monitoring, and log management
- Zeek - network security
- Greenbone (OpenVAS) - open vulnerability Scanner
- OWASP - ZAProxy web app scanner
- Infection Monkey - Open-Source-BAS-Plattform (Breach and Attack Simulation)
- ZoneMinder.com - opensource video Surveillance software