Top 20 NuGet identity Packages

Adds permission based authorization capability on the top of Asp.NET MVC Identity framework
ASP.NET Core Identity Extension using Mongo DB as storage
The core infrastructures for Asp.Net Core to convert RESTful API to code + message/data structure.
Neo4j database ASP.NET Identity Provider based on the Neo4jClient, and Neo4jClient.DataAnnotations projects.
This package offers the ability to use RavenDb 4.0 as a storage engine for ASP.NET Core 2.0 Identity
ASP.NET Core Identity Extension using Mongo DB as storage
Aurochses.AspNetCore.Identity is a library for ASP.NET Core Identity.
Azure Storage implementation of Identity stores (like IUserStore and others)
Nhibernate-based persistence layer for IdentityServer3
Dnx.Identity.MongoDB Class Library
ASP.NET Core Identity provider based on Neo4j
Apache Cassandra data store adapter for ASP.NET Core Identity, which allows you to build ASP.NET Core web applications, including membership, login, and user data. With this library, you can store your user's membership related data on Apache Cassandra.
A persistence provider for AspNet Identity using Shaolinq
ASP.NET Identity providers that use NHibernate and Sharp Architecture.
Wilcommerce Authentication and Authorization library
.NET wrapper for someone.id API
An ASP.NET Identity 2.1 provider that uses FluentNHibernate. Supports MySQL, SQL Server, Oracle, DB/2, SQLite, Firebird, PostgreSQL, SQLAnyWhere, SQL Server Compact Edition.