Top 20 NuGet oauth2 Packages

RFC8252 compliant and certified OpenID Connect and OAuth 2.0 client library for native applications
ASP.NET Core authentication handler to validate JWT and reference tokens from IdentityServer4
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...
Adds .NET Framework 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: https://docs.servicestack.net/authentication-and-authorization
Entity Framework layer for the administration of the IdentityServer4
ASP.NET Core External Security Provider for CloudFoundry
Entity Framework layer for the administration of the Asp.Net Core Identity and IdentityServer4
Business Logic layer for the administration of the Asp.Net Core Identity and IdentityServer4
Business Logic layer for the administration of the IdentityServer4
A parser of WWW-Authenticate challenge headers.
Access token validation middleware for JWT and reference tokens issued by IdentityServer3, based on JWT 5, Owin 4 and IdentityModel 4
Base Security Provider for CloudFoundry
ASP.NET 4.x External Security Provider for CloudFoundry - Owin
Helper library for identity & access control in .NET 4.0/WIF and .NET 4.5 (includes MVC4 and Web API support).
OpenID Connect and OAuth 2.0 Testing-Framework for ASP.NET Core and IdentityServer4
Bit.Server.IdentityServer
Shared Business Logic layer for the administration of the IdentityServer4 and Asp.Net Core Identity
EntityFramework extensions for the administration of the IdentityServer4 and Asp.Net Core Identity
A library to add OAuth2 security to a COFRS REST Service
Templates for the administration of the IdentityServer4 and Asp.Net Core Identity