Top 20 NuGet authorize Packages

Access Management Control by RESTfull API
Extention for ASP.NET MVC and ASP.NET WebApi applications
Access Management Control
AccessControlHelper for asp.net mvc and asp.net core apps
Lightweight library for implementing roles-based access control (RBAC). With Gatekeeper, you can define users, roles, resources, and permissions, and authorize requests.
This library is used in the verification project when Ocelot is used as an API gateway. In the Ocelot project, the API project, the verification project, and the injection function can be used.
Allows same AuthorizeAttribute behavior for Azure Functions
Html Helpers for Authorize .NET
Simple Oauth2 client.
Oauth2 delegation through Windows Azure Access Control Service for ASP.NET Web API.
ASP.Net identity utilities for Azure
Interceptor for CodeCop to use in Web Applications that automatically validates if user is authenticated on each intercepted method.
OWIN dummy authentication handler
RestSharp dummy authenticator
A small library to authorize users based on one string each character represent a role and roles are stored as a static class in your project, each role has a value represent it location in the string.
Encrypted Token based authentication and authorization for MVC Projects
Me: Sons of Djorks, I am Magical Unicorn - Mvc Request Header Authorization Attribute. You: You're 7 GitHub projects, tall ... Me: Yes, I've heard. Kills Meme's by the hundreads and if he were here he'd consume Rails with fireballs from his eyes and bolts of lightning from his arse. I AM MGMRHAA. ...
Enable token generating and validating as a middleware
An authrorize attribute that lets you use an array of roles or users rather than creating a comma-delimited string
An authrorize attribute that lets you use an array of roles or users rather than creating a comma-delimited string