Self-hosted, lightweight server and website monitoring and O&M tool
The Network UPS Tools repository
A suite of Monitoring Plugins (formerly known as nagios-plugins)
A utility to safely generate malicious network traffic patterns
Floating window used to display current network speed, CPU & memory
The Active Monitoring System
Lightweight network IP scanner
Monitor temperature sensors, fan speed, voltage, load & clock speeds
Community-based GPL-licensed network monitoring system
pg_activity is a top like application for PostgreSQL server activity
Application to comfortably monitor your Internet traffic
Open-source systems performance monitor
The core of our monitoring platform
Apache HertzBeat(incubating) is a real-time monitoring system
An eye on your system
BGP and RPKI monitoring tool
Open source monitoring system and time series database
Enterprise-Grade Open-Source Network Management Platform
The open source time series database
Free and Open Source network access control (NAC) solution
A distributed and high-performance monitoring system
Zeek is a powerful network analysis framework
A fancy self-hosted monitoring tool
Cross-platform lib for process and system monitoring in Python
A Swiss army knife for your daily Linux network plumbing