Top 20 NuGet authorize Packages

Dynamically authorize users without hard coding roles
Simple web UI to create role and role access for DynamicAuthorization
JSON store for DynamicAuthorization
AccessControlHelper for mvc and core apps
HtmlHelper for creating ActionLinks if current user is authorized to view destination page.
Simple Oauth2 client.
ASP.Net identity utilities for Azure
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.
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.
Lightweight library for implementing roles-based access control (RBAC). With Gatekeeper, you can define users, roles, resources, and permissions, and authorize requests.
Encrypted Token based authentication and authorization for MVC Projects
Access Management Control by RESTfull API
Extention for ASP.NET MVC and ASP.NET WebApi applications
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. ...
Oauth2 delegation through Windows Azure Access Control Service for ASP.NET Web API.
Allows easy IP address access filtering by simply adding an attribute to MVC controller or controller action. It supports: - single IP address filtering - multiple IP address filtering - single IP address range filtering - multiple IP address range filtering - a list of roles with linked IP addresse...
Enable token generating and validating as a middleware