A suite of Monitoring Plugins (formerly known as nagios-plugins)
Self-hosted, lightweight server and website monitoring and O&M tool
Monitor temperature sensors, fan speed, voltage, load & clock speeds
The Active Monitoring System
An open source recommender system service written in Go
Disk Inspection and Monitoring
Open source monitoring system and time series database
Xray panel supporting multi-protocol multi-user expire day
Free open source tool for real-time PC hardware sensor monitoring
Visibility into servers, applications, and infrastructure
Scouter is open source APM (Application Performance Management) tool
Lightweight network IP scanner
Application Performance Monitoring System
An eye on your system
A distributed and high-performance monitoring system
Real-time monitoring for Proxmox, Docker, and Kubernetes
Status page with uptime monitoring & API monitoring as code
Apache HertzBeat(incubating) is a real-time monitoring system
Cross-platform lib for process and system monitoring in Python
BGP and RPKI monitoring tool
Open-source systems performance monitor
An interactive NVIDIA-GPU process viewer and beyond
The open source, full-stack monitoring platform
A Python based monitoring and tracking tool for Plex Media Server
pg_activity is a top like application for PostgreSQL server activity