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