[Jaeger \ˈyā-gər\](https://jaegertracing.io) is a distributed tracing system, originally open sourced by Uber Technologies. It provides distributed context propagation, distributed transaction monitoring, root cause analysis, service dependency analysis, and performance / latency optimization. Built with OpenTracing support from inception, Jaeger includes OpenTracing client libraries in several languages, including Java, Go, Python, Node.js, C++ and C#. It is a Cloud Native Computing Foundation member project.
Instana provides an APM solution supporting OpenTracing in Crystal, Go, Java, Node.js, Python and Ruby. The Instana OpenTracing tracers are interoperable with the other Instana out of the box tracers for .Net, Crystal, Java, Scala, NodeJs, PHP, Python and Ruby.
Apache SkyWalking is an APM (application performance monitor) tool for distributed systems, specially designed for microservices, cloud native and container-based (Docker, K8s, Mesos) architectures. Underlying technology is a distributed tracing system. The SkyWalking javaagent is interoperable with OpenTracing-java APIs.
inspectIT aims to be an End-to-End APM solution for Java with support for OpenTracing. The instrumentation capability allows to set up inspectIT in no time with an extensive support for different frameworks and application servers. For more information, take a look at the documentation.
Stagemonitor is an open-source tracing, profiling and metrics solution for Java applications. It uses byte code manipulation to automatically trace your application without code changes. Stagemonitor is compatible with various OpenTracing implementations and can report to multiple back-ends like Elasticsearch and Zipkin. It also tracks metrics, like response time and error rates.