There are 2 repositories under virtual-actors topic.
Orleans Membership provider for Kubernetes
Workflow Foundation (.Net 4.x System.Activities workflows) over Microsoft Orleans framework, providing stable, long-running, extremely scalable processes with XAML designer support.
:punch: Awesome lists of actor model resources
Orleans providers for Azure Cosmos DB
An opinionated way of implement Orleans Grains as Serverless Functions
Stuffs I like to talk about...
Spawn Actor Service Mesh Python Support
Various data structures implemented on top of Microsoft Orleans
A Microsoft Orleans Dashboard application based on Blazor
Streaming adapter for Microsoft.Orleans using Microsoft.FASTER log
Cloud-native workload scheduler