Refit
Refit: The automatic type-safe REST library for .NET Core, Xamarin and .NET
Remote Linq is a small and easy to use - yet very powerful - library to translate linq expression trees to strongly typed, serializable object trees and vice versa. It provides functionality to send arbitrary linq queries to a remote service to be applied and executed against any enumerable or queryable data source.
Rules Engine is a library/NuGet package for abstracting business logic/rules/policies out of a system. It provides a simple way of giving you the ability to put your rules in a store outside the core logic of the system, thus ensuring that any change in rules don't affect the core system.