- Prelude-LML: A sensor to monitor logfiles using predefined rulesets.
- Auditd: The Linux Audit Daemon.
- Nepenthes: A versatile tool to collect malware.
- NuFW: An identity access management solution at the network level.
- OSSEC: An Open Source Host-based Intrusion Detection System.
- Linux-PAM: Linux Pluggable Authentication Modules.
- Samhain: A file integrity checker.
- SanCP: A network traffic statistical information collector
- Snort: The Defacto Standard Open Source IDS.
