Top 20 NuGet health Packages

Library for collecting and tracking performance metrics in your .NET applications.
A simple and easy to use load testing framework for .NET
Embedding tests into applications to execute at run-time.
Provides ready to use code to perform common health checks.
Provides ready to use code to perform connection check using sockets.
YesSensu
Provides ready to use code to perform Windows directory permission checks.
Generate shallow and/or deep monitoring endpoints dynamically for WCF services.
Health monitoring middleware for ASP.NET Core apps
Opinionated WebApi project setup and configuration
Sql Server Availability Telemetry for System Health
Availability Telemetry for System Health
Package to enable monitoring the health status of your home page. Can send warnings and status updates through email or your own custom prefferred way when something is wrong.
Health check functionality for ASP.NET Mvc and Web Api projects
Provides an implementation of an ASP.NET Core health check that runs a given query against a resolved Entity Framework 6 db context.
Base domain objects. Common domain objects such as settings. [covered by 30+ tests]
A health check to verify configuration values.