Self-hosted, lightweight server and website monitoring and O&M tool
Concise networking code leveraging async-await, Decodable & Generics
Open source APM: OpenTelemetry traces, metrics, and logs
Sentry SDKs for JavaScript
CLI tool for configuring and monitoring Claude Code
Datadog Go Library including APM tracing, profiling, and security
Elastic APM .NET Agent
Nagios Open Source network monitoring software - The Standard In ITM
Cross-platform application monitoring and error tracking software
Lightweight network IP scanner
The Active Monitoring System
Monitor temperature sensors, fan speed, voltage, load & clock speeds
Real-time Claude Code usage monitor with predictions and warnings
Vendor-neutral programmable observability pipelines
Scouter is open source APM (Application Performance Management) tool
Apache HertzBeat(incubating) is a real-time monitoring system
BGP and RPKI monitoring tool
Open source monitoring system and time series database
Ncurses-based monitoring application for wireless network devices
Manages, configures, and monitors Microsoft 365 tenant configurations
sp_whoisactive
A fancy self-hosted monitoring tool
Monitor and troubleshoot transactions in complex distributed systems
Open-source systems performance monitor
Application Observability using eBPF