CitraTest APM
End-user performance monitoring for Citrix, RDS, VDI and Windows applications
Pinpoint APM
Open source APM for large-scale distributed systems
Glowroot
Open source, low-overhead application performance monitoring (APM) for Java
New Relic
Observability platform for application performance monitoring
Sentry
Application error and performance monitoring
DebugBear
Page speed and Core Web Vitals monitoring