Top 20 NuGet actor Packages

Sharded actors with managed lifecycle for Akka.NET cluster. Used to distribute state in a fault-tolerant, consistent fashion over an Akka.NET cluster.
Akka.NET Persistence ADO.NET middleware
TestKit for writing tests for Akka.NET using xUnit.
Replicated data using CRDT structures
Distributed coordination support for Akka.NET
Canonical actor model implementation for .NET with local + distributed actors in C# and F#.
Remoting support for Akka.NET. Allows actors to communicate over the network.
Persistence for Akka.NET actors. Allows actors to persist and recover their state in a database-agnostic fashion.
You need a Akka.TestKit.* package! Add the one appropriate for the test framework you use instead. For example: Akka.TestKit.Xunit or Akka.TestKit.VsTest. This package only contains base functionality for writing tests for the Akka.NET framework.
Dependency injection support for Akka.NET [DEPRECATED - replaced by Akka.DependencyInjection]
Clustering support for Akka.NET actors. Used to build highly-available, distributed applications.
Streaming support for Akka.NET. Introduces a LINQ-like interface for writing asynchronous, back-pressure-aware streams built on top of Akka.NET actors.
Hyperion serializer for Akka.NET
Distributed publish/subscribe, client and singleton support for Akka.NET cluster
ServiceFabric.Mocks contains many mocks and helper classes to facilitate and simplify unit testing of your Service Fabric Actor and Service projects.
Stream based query interface for persistence journal plugins for Akka.NET
Replicated data using CRDT structures
Akka.NET streams support for ADO.NET Persistence middleware.
Serilog logging adapter for Akka.NET.
Akka.NET Persistence journal and snapshot store backed by SQLite.