The Prometheus monitoring system and time series database.

macOS system monitor in your menu bar

APM, Application Performance Monitoring System

SQL powered operating system instrumentation, monitoring, and analytics.

Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.

Python SDK for Agent AI Observability, Monitoring and Evaluation Framework. Includes features like agent, llm and tools tracing, debugging multi-agentic system, self-hosted dashboard and advanced analytics with timeline and execution graph view

A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ http://www.windows-internals.com

Yet another cross-platform graphical process/system monitor.

Cross-platform lib for process and system monitoring in Python

System monitoring dashboard for terminal

Linux System Optimizer and Monitoring - https://oguzhaninan.github.io/Stacer-Web

Lightweight real-time memory management application to monitor and clean system memory on your computer.

💪🏻 Blazing-fast system monitoring for your desktop (built with Rust, Tauri & Svelte)

Light-weight system monitor for X, Wayland, and other things, too

Easily manage the brightness of your monitors in Windows from the system tray

Libre Hardware Monitor is free software that can monitor the temperature sensors, fan speeds, voltages, load and clock speeds of your computer.

Evidently is ​​an open-source ML and LLM observability framework. Evaluate, test, and monitor any AI-powered system or data pipeline. From tabular data to Gen AI. 100+ metrics.

An open-source and enterprise-level monitoring system.

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine developed by the OISF and the Suricata community.

A cross-platform file change monitor with multiple backends: Apple macOS File System Events, *BSD kqueue, Solaris/Illumos File Events Notification, Linux inotify, Microsoft Windows and a stat()-based backend.

Native Operating System and Hardware Information

OSSEC is an Open Source Host-based Intrusion Detection System that performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.

Community-based GPL-licensed network monitoring system

Stack Exchange's Monitoring System

A binary authorization and monitoring system for macOS

Connect external monitors to your system via Wifi-Display specification also known as Miracast

A complete workflow automation and server monitoring system.

Performance monitoring tools for Linux

An environmental monitoring and regulation system

A AI-Driven, Distributed and high-performance monitoring system, for comprehensive monitoring and management of kafka cluster.