Top 20 NuGet authentication Packages

Lazy authentication OAuth2 allows you to easily add OAuth to your owin projects.
A library for enabling ASP.Net Identity to work with Umbraco front-end members. Original code used a SqlCe data store. This one uses a MySql database rather than a Sql CE database
An owin middleware for JWT tokens and optional cookie parsing with an owin signin delegate.
Common components for building a web based platform.
Saml2 IdP Owin Middleware
ASP.Net Core middleware that enables an application to support Discord's OAuth 2.0 authentication workflow.
ASP.NET Core middleware that enables an application to support the Baidu Account authentication workflow.
ASP.NET Core middleware that enables an application to support the Douban Account authentication workflow.
ASP.NET Core middleware that enables an application to support the NetEase Account authentication workflow.
ASP.NET Core middleware that enables an application to support the Qihoo Account authentication workflow.
ASP.NET Core middleware that enables an application to support the Sina Account authentication workflow.
ASP.NET Core middleware that enables an application to support the Taobao Account authentication workflow.
ASP.NET Core middleware that enables an application to support the Tencent QQ Account authentication workflow.
ASP.NET Core middleware that enables an application to support the WeiXin Account authentication workflow.
ASP.NET Core middleware that enables an application to support the Yixin Account authentication workflow.
ASP.NET Core middleware that enables an application to support the Youku Account authentication workflow.
Easy and Simple way to add membership feature to your project. based on Asp.net Identity, Owin, Entity Framework.
zxm.AspNetCore.Authorization.Hmac is an extensions to authorization with zxm.AspNetCore.Authorization.Hmac.
zxm.AspNetCore.Authentication.Hmac.Identity is an extensions to authorization with zxm.AspNetCore.Authorization.Hmac.
Owin.JwtAuth provides JSON Web Token authentication with X509 signing and configuration stored in App.config/Web.config.