Developer-first error tracking and performance monitoring
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SigNoz is an open-source, OpenTelemetry-native observability platform for your team and their AI agents. Get logs, metrics, and traces in one tool with features like APM, distributed tracing, log management, infra monitoring, etc. Combined with SigNoz MCP and a native AI teammate (in SigNoz Cloud) it helps you build more resilient apps.
APM, Application Performance Monitoring System
Open source observability platform for logs, metrics, traces, RUM (web, android, ios), Session replay, pipelines, SLO and LLM observability. A sophisticated, simple and highly performant alternative to Datadog, Splunk, and Elasticsearch with 140x lower storage costs and single binary deployment.
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.
Matrix is a plugin style, non-invasive APM system developed by WeChat.
Coroot is an open-source observability and APM tool with AI-powered Root Cause Analysis. It combines metrics, logs, traces, continuous profiling, and SLO-based alerting with predefined dashboards and inspections.
eBPF Observability - Distributed Tracing and Profiling
JavaMelody : monitoring of JavaEE applications
The open-source files comprising Leap Motion's Project North Star AR Headset.
Open source monitoring and visualization UI for the TICK stack
Profiling / Debugging assist tools for iOS. (Memory Leak, OOM, ANR, Hard Stalling, Network, OpenGL, Time Profile ...)
New Relic RPM Ruby Agent
The official Airbrake library for Ruby applications
OpenTelemetry Compile-Time Instrumentation for Golang
Finally a Fortran MVC web platform
An OpenJDK release maintained and supported by SAP
(UNMAINTAINED) inspectIT is the leading Open Source APM (Application Performance Management) tool for analyzing your Java (EE) applications.
99+ CLI tools to build, browse, and blend your media library
Play with bitmaps
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Leap Motion AS3 API.
Excerpt from the Gapminder data, as an R data package and in plain text delimited form