The Network UPS Tools repository
Disk Inspection and Monitoring
A suite of Monitoring Plugins (formerly known as nagios-plugins)
SQL operating system instrumentation and monitoring framework
Performance Co-Pilot
Bandwidth monitor and rate estimator
Tools for BPF-based Linux IO analysis, networking, monitoring, etc.
A Swiss army knife for your daily Linux network plumbing
Powerful system task manager
High performance ping tool
Ncurses-based monitoring application for wireless network devices
Leading open-source visualization and observability platform
Nagios Open Source network monitoring software - The Standard In ITM
Simple tool to configure Windows Filtering Platform (WFP)
ZMap is a fast single packet network scanner for network surveys
The systemd system and service manager
Open Source Monitoring System for performance and availability.
Powerful, open-source network protocol analyzer
LDAP tools to support formerly NIS environments.
Drawing, graphics conversion, software development, administration.
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool