Top 20 NuGet aspnetcore Packages

OAuth 2.0 authentication provider that wraps OpenIdConnect.Server up into an easier-to-use package.
Models, messaging services and extensions for a Microsoft.AspNetCore.Identity MVC web app
Provides a strongly typed way of specifying and accessing settings using dependency injection.
Simple .Net Standard library for sending and receiving json and bson messages through WebSocket.
PiranhaCMS Module that adds .NET Core Identity User Management interface to Piranha.Manager.
Integration of Greentube.Serialization with Microsoft.DependencyInjection.
Equalizer is aspnetcore middleware for load-balancing service instances from Nanophone and contains several routers to choose from
Core components for Swashbuckle - a Swagger toolchain for ASP.NET Core
A GraphiQL Integration for AspNetCore
A GraphQL Playground Integration for AspNetCore
ASP.NET Core 2.0 middleware and helpers for Firestorm.
Persistence for EF 6 functionality for any Breeze Server using .NET Core
The MongoDB Identity works like AspNetCore Identity. Just differents is store the identity to mongo store. You are easily manage the identity and this is awesome. You can also CRUD operation into MongoDB like AspNetCore.MongoDB library.
Components for providing real-time bi-directional communication across the Web.