Top 20 NuGet owin Packages

Owin middleware to catch and report exceptions
Owin middleware to serve static files
Owin middleware to map requests for the site root to a specific page on the site
Owin Framework IIdentityStore facility that stores identity information in a database using Prius ORM
Mocks of Owin Framework interfaces to use in your unit tests
Owin middleware to serve applications written in Dart
Owin middleware to compile LESS files to CSS files on the fly
Owin middleware to cache responses that are expensive to construct and don't change between requests
Owin middleware to version static assets and cache them indefinately on the browser
Owin Framework ITokenStore facility that uses the Prius ORM to store tokens
User interface for managing groups, roles and permissions for the Owin Framework authorization middleware
Owin Framework authorization middleware that checks if the identity making the request has permission to do so and returns a 403 response if it does not
Data access layer for the Owin Framework authorization middleware that uses the Prius ORM
Helper library for claims based identity & access control in OWIN/Katana based applications.
OWIN middleware for validating OAuth2 and OpenID Connect scope claims.
Plugin for adding WS-Federation Identity Provider capabilities to IdentityServer3
This package adds support for integrated Windows authentication to IdentityServer.
OWIN middleware implementation mixing Windows and Forms Authentication.
The library provides support for integrating Owin with the Metrics.NET Library
Seamlessly adds a Swagger to WebApi projects! Compiled for .NET 4.5 and up. This helps with mono compatability and does not require any assembly redirects.