Top 20 NuGet authentication Packages

A SAML2 Owin middleware, compatible with ASP.NET Identity for external logins.
Package Description
OpenID Connect server middleware for ASP.NET Core.
This package contains the binaries of the Active Directory Authentication Library (ADAL). ADAL provides easy to use authentication functionality for your .NET based client by taking advantage of Windows Server Active Directory and Azure Active Directory. ADAL.NET enables you to acquire a secur...
ASP.NET Core common types used by the various authentication middleware components. This package was built from the source code at https://github.com/aspnet/Security/tree/93926543f8469614c2feb23de8a8c0561b8b2463
OpenID Connect extensions for the OpenID Connect server middleware.
Entity Framework Core stores for OpenIddict.
OpenIddict's core components, used to manage the applications, authorizations, scopes and tokens stored in the database.
Easy-to-use OpenID Connect server for ASP.NET Core.
Official .NET SDK for the Okta API.
Auth0 .NET SDK
Package Description
This package contains classes for issuing App Service Authentication tokens. For more information, check out http://azure.microsoft.com/mobile.
OAuth2 validation middleware for ASP.NET Core.
OpenID Connect primitives for the OpenID Connect server middleware.
ASP.NET Core common types used by the various authentication middleware components. This package was built from the source code at https://github.com/aspnet/HttpAbstractions/tree/91db78cf926939821bc96e8e60616cf5dde0b489
ASP.NET Core common types used by the various authentication components. This package was built from the source code at https://github.com/aspnet/HttpAbstractions/tree/91db78cf926939821bc96e8e60616cf5dde0b489
OpenIddict binders for ASP.NET Core MVC.
Auth0 .NET SDK
OpenID Connect server components for OpenIddict.