Top 20 NuGet oauth2 Packages

OpenID Connect & OAuth 2.0 client library
IdentityServer is a framework and a hostable component that allows implementing single sign-on and access control for modern web applications and APIs using protocols like OpenID Connect and OAuth2. It supports a wide range of clients like mobile, web, SPAs and desktop applications and is extensible...
OpenID Connect and OAuth 2.0 Framework for ASP.NET Core
ASP.NET Core Identity Integration for IdentityServer4
EntityFramework persistence layer for IdentityServer4
Auth0 .NET SDK
Package Description
ASP.NET Core authentication handler to validate JWT and reference tokens from IdentityServer4
Chilkat .NET Core Class Library
ASP.NET Core 2.0 Middleware for validating tokens using OAuth 2.0 introspection
Auth0 .NET SDK
Auth0 .NET SDK
Access token validation middleware for JWT and reference tokens issued by IdentityServer3.
Package Description
A simple authentication filter for WebApi that supports azure ad b2c
Storage interfaces and models for IdentityServer4
ASP.NET Core External Security Provider for CloudFoundry
Adds OAuth2 Providers for use in ServiceStack Web and REST Services. Includes built-in support for Google and LinkedIn OAuth2 providers. More Info on Auth Providers: http://docs.servicestack.net/authentication-and-authorization
Helper library for claims based identity & access control in OWIN/Katana based applications.
Plugin for adding WS-Federation Identity Provider capabilities to IdentityServer3