#logging

Apache Log4net is a versatile, feature-rich, efficient logging API and backend for .NET

Logging extensions for xunit

AI-native TypeScript bot framework — one codebase for 20+ chat platforms (QQ, Discord, Telegram, Slack, WeChat…). Opt-in AI agent with MCP, tools & security policies. <10MB core.

Pluggable foundation blocks for building distributed apps.

A log viewer for Kubernetes troubleshooting

Official language bindings and library extensions for Axiom

A simple logging interface for Go

LoopBack makes it easy to build modern API applications that require complex integrations.

A logging implementation for `log` which is configured via an environment variable.

Compressed Log Processor (CLP) is a free log management tool capable of compressing logs and searching the compressed logs without decompression.

Node.JS SDK for Raygun

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

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

Logging implementation for Rust

Efficient, deferred formatting for logging on embedded systems

FastGPT is a knowledge-based platform built on the LLMs, offers a comprehensive suite of out-of-the-box capabilities such as data processing, RAG retrieval, and visual AI workflow orchestration, letting you easily develop and deploy complex question-answering systems without the need for extensive setup or configuration.

The headless Chrome/Chromium driver on top of Puppeteer. Take screenshots, generate PDFs, extract text and HTML with a production-ready API.

OpenTelemetry signal storage

Near-lock-free structured logging for Rust: a 65,536-slot ring buffer, formatting deferred to a background thread, 14 output formats (JSON, ECS, GELF, OTLP, logfmt…) and native os_log/journald sinks. Plus an OTLP/HTTP exporter, an MCP server for AI agents, Tower middleware, PII redaction, WebAssembly bindings and a jq-style CLI.

Blazing fast, structured, leveled logging in Go.

NLog as Logging Provider for Microsoft Extension Logging

Unified observability for logs, metrics and traces — low overhead instrumentation (Rust, Unreal Engine 5), OTLP ingestion, SQL analytics on DataFusion over Parquet, presentation through notebooks, Grafana and Python. Self-hosted.