Cosmos Event Sourcing
Azure Cosmos DB as an event sourcing store
.NET Friendly Extensions
Use familiar extension method syntax on top of the IServiceCollection to configure the library.
Polymorphic Serializer's
Takes care of handling serializing and de-serializing different event payloads.
Usability
The APIs have been written in a way which are easy to get started in your event sourcing journey. It offers a lof of extras out the box you could use to get started quickly.