The Network UPS Tools repository
A Swiss army knife for your daily Linux network plumbing
Performance Co-Pilot
High performance ping tool
SQL operating system instrumentation and monitoring framework
Ncurses-based monitoring application for wireless network devices
Nagios Open Source network monitoring software - The Standard In ITM
Open Source Monitoring System for performance and availability.
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
ICMP-based network bandwidth measurement tool
Powerful, open-source network protocol analyzer
Intelligently block brute-force attacks by aggregating system logs
Manage and interpret IPMI systems with common a software tool
Network Load Balancer and Application Security
Firewall log analyzer
High capacity syslog data collection, filtering, and management.