A suite of Monitoring Plugins (formerly known as nagios-plugins)
Self-hosted, lightweight server and website monitoring and O&M tool
The open source post-building layer for agents
Monitor the stability of a Pandas or Spark dataframe
Monitor temperature sensors, fan speed, voltage, load & clock speeds
Floating window used to display current network speed, CPU & memory
Monitor temperature sensors, fan speeds, voltages, load & clock speeds
Disk Inspection and Monitoring
The Active Monitoring System
Status page with uptime monitoring & API monitoring as code
Turn WiFi signals into real-time human sensing and spatial awareness.
The open source time series database
Lightweight network IP scanner
Xray panel supporting multi-protocol multi-user expire day
Scouter is open source APM (Application Performance Management) tool
Visibility into servers, applications, and infrastructure
The Network UPS Tools repository
An eye on your system
Vitals — Hardware Monitor with In-Game Overlay
The Open Source Security Platform
BGP and RPKI monitoring tool
An interactive NVIDIA-GPU process viewer and beyond
A fancy self-hosted monitoring tool
A Python based monitoring and tracking tool for Plex Media Server
Real-time monitoring for Proxmox, Docker, and Kubernetes