JConsole - Provides information about performance and resource consumption for Java applications.
Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.
YourKit Java Profiler - Java profiler
Kafka - Apache Kafka is publish-subscribe messaging rethought as a distributed commit log.
VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.