The problem with all of the preceding solutions is that they mostly target Docker containers, which are first and foremost Linux-centric. Azure Service Fabric, on the other hand, is a Windows-first product backed by Microsoft. It enables running legacy Windows apps without modifications, which may help you migrate your application if it relies on such services.
As with Kubernetes, Azure Service Fabric is not so much a container orchestrator in itself, but rather a platform on top of which you can build your applications. One of the building blocks happens to be containers, so it works fine as an orchestrator.
With the recent introduction of Azure Kubernetes Service, the managed Kubernetes platform in the Azure cloud, there is less need for using Service Fabric.
