DotnetKit 

Fluent Dataflow builder wrapper and extensions to to build fast and efficient Dataflow pipelines

MetricFlow is a lightweight .NET library designed to help developers define and track functional and domain-oriented metrics (such as counters, timers, and event-based measurements).

ASP.NET Core extensions and middleware for MetricFlow, providing automated HTTP request tracking, endpoint routing resolution, and metric exposition.

OpenTelemetry integration for MetricFlow, providing automated meter binding, OTLP and Prometheus exporter bridging, and trace correlation.