Logging GitHub Repositories (2026) · Open Source Tools

Ultra-lightweight error tracking server compatible with Sentry SDKs

Like Prometheus, but for logs.

AI observability platform for production LLM and agent systems.

A debugging and profiling tool that can trace and visualize python code execution

Unobtrusive logging library with zero dependencies for Deno, Node.js, Bun, browsers, and edge functions

Fast and easy to use database for logs, which can efficiently handle terabytes of logs

Log file navigator

APM, Application Performance Monitoring System

The Rust OpenTelemetry implementation

Apache Log4j is a versatile, feature-rich, efficient logging API and backend for Java.

Efficient, deferred formatting for logging on embedded systems

Platform agnostic logger for NestJS based on Pino with REQUEST CONTEXT IN EVERY LOG

Taikai is an extension of the popular ArchUnit library, offering a comprehensive suite of predefined rules and checks tailored for various technologies.

Digging through logs is not observability. It's hope — wide events, structured errors, TypeScript-first, every runtime.

Webbased Amateur Radio Logging Software - Log your contacts from everywhere!

OpenTelemetry Go API and SDK

Pluggable foundation blocks for building distributed apps.

OpenTelemetry Python API and SDK

An opinionated GoLang framework for accelerated microservice development. Built in support for databases and observability.

Fluentd: Unified Logging Layer (project under CNCF)