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
Disk Inspection and Monitoring
The Active Monitoring System
The open source time series database
Free open source tool for real-time PC hardware sensor monitoring
Xray panel supporting multi-protocol multi-user expire day
Open source monitoring system and time series database
BGP and RPKI monitoring tool
The Open Source Security Platform
The Network UPS Tools repository
An eye on your system
Visibility into servers, applications, and infrastructure
Scouter is open source APM (Application Performance Management) tool
GRBL controller application with G-Code visualizer written in Qt
A Vulkan and OpenGL overlay for monitoring FPS, temperatures, CPU/GPU
A fancy self-hosted monitoring tool
A distributed and high-performance monitoring system
Terminal-based CPU stress and monitoring utility
Cross-platform lib for process and system monitoring in Python
Application Performance Monitoring System