Light-weight system monitor for X
SQL operating system instrumentation and monitoring framework
Open Source Monitoring System for performance and availability.
Nagios network monitoring software is enterprise server monitoring
Manage and interpret IPMI systems with common a software tool
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Xymon monitors your hosts, your network services, and everything else.
Intelligently block brute-force attacks by aggregating system logs
Firewall log analyzer
ICMP-based network bandwidth measurement tool
repair corrupted pcap and pcapng files
A java PCAP and DPI library
tcptrace analyzes packet tcp connections and provides analysis
A simple, portable port scanner