Top 20 NuGet transport Packages

MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker) and supports v3.1.0, v3.1.1 and v5.0.0 of the MQTT protocol.
A 100% native C# port of the lightweight high performance messaging library ZeroMQ
This is an extension library which provides a managed MQTT client with additional features using MQTTnet.
This is a support library to integrate MQTTnet into AspNetCore.
This is an extension library which allows using _WebSocket4Net_ as transport for MQTTnet clients.
This is an extension library which allows executing synchronous device calls including a response using MQTTnet.
Bindings for Google.Android.DataTransport.TransportRuntime package
Redis transport provider for SlimMessageBus
Bindings for Xamarin Google.Android.DataTransport.TransportBackendCct package
Bindings for Google.Android.DataTransport.TransportApi package
Rebus integration of Correlate to correlate message flow via any supported Rebus transport.
Client connectivity bits, exposes a potentially cluster aware request pipeline that can be resilient to nodes dropping out of rotation. This package is heavily optimized for the Elastic (elastic.co) product suite and Elastic Cloud (cloud.elastic.co) SAAS offering.
GraphQL Server Core
WebSockets transport for subscriptions
PeachtreeBus is intended to be a light weight message bus system focused integration with SQL server for its transport and persistence, while playing nicely with applications built using Inversion of Control and Dependency Injection.
A 100% native C# port of the lightweight high performance messaging library ZeroMQ (Planetarium fork)
PeachtreeBus.SimpleInjector is a package that contains classes and extensions for integrating PeachtreeBus with SimpleInjector.
Reactive Extensions (RX) with NetMQ as the transport layer. Send messages anywhere on the network!
SyncData is a framework for Bi-Directional Synchronization in .NET applications.
This is a support library to integrate AttributeRouting into MQTTnet with AspNetCore. Easily create Controllers and Actions to process incoming MQTT messages using attribute-based routing against the incoming message topic.