Open source APM: OpenTelemetry traces, metrics, and logs
Sentry SDKs for JavaScript
Cross-platform application monitoring and error tracking software
Monitor and troubleshoot transactions in complex distributed systems
Application Performance Monitoring System
Application Observability using eBPF
Web UI for Jaeger
The Java agent for Apache SkyWalking
SigNoz is an open-source APM. It helps developers monitor their apps
SkyWalking RocketBot UI
ss7mon an SS7/SIGTRAN signalling monitor