Fast C++ logging library.

Like Prometheus, but for logs.

Structured, pluggable logging for Go.

APM, Application Performance Monitoring System

Blazing fast, structured, leveled logging in Go.

Python logging made (stupidly) simple

Sends your logs to files, sockets, inboxes, databases and various web services

Never use print for debugging again

Logstash - transport and process your logs, events, or other data

A fast & simple, yet powerful & flexible logging framework for macOS, iOS, tvOS, watchOS and visionOS

Fluentd: Unified Logging Layer (project under CNCF)

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

A powerful framework for faster, easier, and more efficient project development.

Zero Allocation JSON Logger

A tiny JavaScript debugging utility modelled after Node.js core's debugging technique. Works in Node.js and web browsers

Main Sigma Rule Repository

Realtime log viewer for containers. Supports Docker, Swarm and K8s.

The POCO C++ Libraries are powerful cross-platform C++ libraries for building network- and internet-based applications that run on desktop, server, mobile, IoT, and embedded systems.

Log file navigator

Free and open log management