Top 20 NuGet owin Packages

Provides a default starting point for setting up a new JWT OAuth server which includes Its.Configuration and Its.Log with a set of classes that preconfigure numerous defaults. All you have to do is provide service setup and your actual authentication (one method implementation).
Package Description
The Core lib that handles watching your files.
Fast Owin Web server in pure .Net without reliance on HttpListener or Win8, includes WebSockets and SSL support
A Simple.Owin extension that provides testing helper APIs and abstractions
OWIN middleware for requiring SSL connections and client certificates.
The middleware for OWIN pipeline. This application infrastucture for Single Page Application based on the Web API services
RavenDB job storage for Hangfire
Exira.SimpleHttpServer is a simple HTTP server to serve static files
Reactive Web Streams allows you to create controllers returning and consuming Rx observables, operating over WebSockets.
An easy to use OAuth 2 authentication provider for ASP.NET MVC5 and OWIN.
Provides Application Insights request and error tracking for both ASP.Net MVC and Web API using OWIN running on IIS.
Owin Basic Authentication
Web Application Framework
NFinal2 MVC framework.Kestrel Server.
Extends the WebApi integration with SignalR support.
Create self hosted OWIN http server in scriptcs
IdentityAdmin.EntityFramework is a persistence layer for IdentityAdmin configuration data that uses EntityFramework as it's database abstraction.
IdentityServer3 Access Token Validation Integration Library for ASP.NET 5
Extends the App.Metrics library providing a set OWIN Middleware Components and Web Api extensions which will record things like error rates per endpoint and an overall rate, request rates per endpoint and an overall rate etc.