High performance ping tool
SQL operating system instrumentation and monitoring framework
WinDivert: Windows Packet Divert
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
Intelligently block brute-force attacks by aggregating system logs
Xymon monitors your hosts, your network services, and everything else.
High capacity syslog data collection, filtering, and management.
Firewall log analyzer
ICMP-based network bandwidth measurement tool
A Swiss army knife for your daily Linux network plumbing
repair corrupted pcap and pcapng files
tcptrace analyzes packet tcp connections and provides analysis