CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。

APM, (Application Performance Management) tool for large-scale distributed systems.

Zipkin is a distributed tracing system

CNCF Jaeger, a Distributed Tracing Platform

📌 a missing Java std lib(simple & 0-dependency) for framework/middleware, provide an enhanced InheritableThreadLocal that transmits values between threads even using thread pooling components.

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

High-level tracing language for Linux eBPF

Airline Booking is a sample web application that provides Flight Search, Flight Payment, Flight Booking and Loyalty points including end-to-end testing, GraphQL and CI/CD. This web application was the theme of Build on Serverless Season 2 on AWS Twitch running from April 24th until end of August in 2019.

Main repository for Datadog Agent

SigNoz is an open-source observability platform native to OpenTelemetry with logs, traces and metrics in a single application. An open-source alternative to DataDog, NewRelic, etc. 🔥 🖥. 👉 Open source Application Performance Monitoring (APM) & Observability tool

OpenTelemetry Go API and SDK

Distributed tracing for spring cloud

Java distributed tracing implementation compatible with Zipkin backend services.

Istio Tutorial for https://dn.dev/master

Application level tracing for Rust.

Observe any stack, any service and any data, using any UI components you prefer, never missing any X factors and resolve them before they become problems.

Web UI for Jaeger

Datadog Go Library including APM tracing, profiling, and security monitoring.

Function graph tracer for C/C++/Rust/Python

Automated upstream mirror for libbpf stand-alone build.