Awesome Actors'ish

Not only actors, concurrency and distributed programming tools are also listed

.NET

Akka.NET

https://getakka.net/

Azure Functions - Durable Entities

https://docs.microsoft.com/sv-se/azure/azure-functions/durable/durable-functions-dotnet-entities

Azure Service Fabric - Reliable Actors

https://docs.microsoft.com/sv-se/azure/service-fabric/service-fabric-reliable-actors-introduction

Coyote

https://microsoft.github.io/coyote/

F# Mailbox

Orleans

https://github.com/dotnet/orleans/

Proto.Actor

https://proto.actor