Suricata is a high performance Network IDS, IPS and Network Security Monitoring engine
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.
This blog is a cursory breakdown of defeating less advanced jailbreak detection code
Prelude is an Hybrid IDS framework, that is, it is a product that enable all available security application, be it opensource or proprietary, to report to a centralized system.
Neben aktuellen security threats gibt es auch aktuelle siganturen für IDS und Konsorten.
Bleeding Edge Threats is a center for Open Security Research.
wlan sniffer und intrusion detector
Intrusion Detection and
Prevention System for Firefox (aber noch Alpha)
The Analysis Console for Intrusion Databases (ACID) is a PHP-based analysis engine to search and process a database of security events generated by various IDSes, firewalls, and network monitoring tools.