Top 20 NuGet configuration Packages

Azure role configuration initializer, manage decryption and type convertion of settings public properties
configuration initializer, manage decryption and type convertion of settings public properties
Allows encoded environmental configurations
Roc.Codebase.DynamicConfiguration
Utilities for loading and accessing configuration data in a scoped manner.
ConfigureMe provides a simple way to extract the value of config entries in web.config and app.config files in a strongly typed fashion.
OOP configuration library.
app.config XML configuration poker
$description
Configuration system for Application (ASP.NET, WPF, UWP, etc). XML or JSON file types are avaliable
Strongly-typed Configuration for .NET Core - with full Dependency Injection support
Reads configuration from json files.
Converts JSON tokens using autofac.