Top 20 NuGet owin Packages

Wilcommerce Authentication and Authorization library
Abp.Owin
NLog logging adapter for OWIN
A full web server whose only dependency is Microsoft.Owin.Host.HttpListener. It can be used in-proc for super-easily stubbing 3rd party dependencies and validating.
Unified OAuth provider for Microsoft work, school, and personal accounts to be used with ASP.NET 4.5 OWIN
Google Recaptcha middleware for OpenIdConnect (IdentityServer)
Application Insights Tracing module for DotVVM
Owin middleware to implement the SAML2 Protocol as a Service Provider
Seamlessly adds a Swagger to WebApi projects!
Common library for NFinal MVC.
A way to translate Exceptions to friendly HTTP responses
Native login throttling middleware for OpenIdConnect (IdentityServer)
Application Insights Tracing module for OWIN and DotVVM
Web Application Framework
This package is part of the Azure Mobile .NET Server SDK and contains Entity Framework support. To learn more about Azure Mobile, go to http://azure.microsoft.com/mobile.
This package is part of the Azure Mobile .NET Server SDK and provides features for the /tables endpoint. To learn more about Azure Mobile, go to http://azure.microsoft.com/mobile.
Annotation attributes for DotVVM Dynamic Data that provide additional features.
Confifu.Owin
Enables XSockets as middleware in OWIN. Requires Win8+
NFinal2 MVC framework.Kestrel Server.