A network security analysis and monitoring toolkit Linux distribution.
Next Generation Open Source Firewall
Open Source Monitoring System for performance and availability.
Poll JMX attributes from Java based applications with Nagios
Web based management tool for unixes
ss7mon an SS7/SIGTRAN signalling monitor
Lomalarga is a VPN-like service based on SSH and Linux.
The Koozali SME Server is a simple and robust server gateway for SOHO