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.

Blazing fast, structured, leveled logging in Go.

Fast C++ logging library.

Never use print for debugging again

Python logging made (stupidly) simple

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

A fast & simple, yet powerful & flexible logging framework for Mac and iOS

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++.