Structured, pluggable logging for Go.

APM, Application Performance Monitoring System

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

Like Prometheus, but for logs.

Fast C++ logging library.

Blazing fast, structured, leveled logging in Go.

Python logging made (stupidly) simple

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 and watchOS

Fluentd: Unified Logging Layer (project under CNCF)

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

GoFrame is a modular, powerful, high-performance and enterprise-class application development framework of Golang.

Zero Allocation JSON Logger

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.

Free and open log management

Main Sigma Rule Repository

NLog - Advanced and Structured Logging for Various .NET Platforms

Convenient & secure logging during development & release in Swift 4 & 5

Fast persistent recoverable log and key-value store + cache, in C# and C++.