Top 20 NuGet middleware Packages

Comments as a middleware for ASP.NET Core apps. Adds comments capabilities to your existing ASP.NET Core app.
A simple yet customizable HTTP response wrapper and exception handler for ASP.NET Core APIs.
Airbrake middleware component for ASP.NET Core pipeline
Owin Anti-forgery Middleware
Owin Middleware to set an x-made-with header to <3
Owin middleware to make your webpages look cuter. This might dramatically increase the traffic and pageviews on your website.
Simple static file middleware for owin.
Middlewares to help secure your apps
ASP.NET vNext Middleware for Worker instances in AWS Elastic Beanstalk
Owin middleware for emulate modRewrite
Role Provider middleware for Owin
Thunk middleware for Redux.NET
Configuration API for ASP.NET
Owin Middleware module for site mail.ru. Working fine with mvc 5.
Owin Middleware module for site yandex.ru. Working fine with mvc 5.