Top 20 NuGet ASP.NET Packages

Owin Middleware to generate WebApi help pages without dependencies on MVC or System.Web. Great for self hosted WebApi. Razor is used for the documentation templates to make it easy to customize. Based on Yao's example http://goo.gl/0YMkKq
RadarCube HTML controls for ASP.NET Web Forms. Provides data visualization and OLAP cube interaction. (Evaluation version).
TypeScript CodeDOM has TypeScriptCodeProvider implementing ICodeGenerator which has been used in POCO2TS.exe and Strongly Typed Client API for Web API.
Assists with validating responses from web APIs. E.g. by validation of JSON-schema etc.
An NTLM authentication middleware for OWIN that enables you to use NTLM (Windows) Authentication independently of IIS or HTTPListener. Furthermore it integrates with ASP.NET Identity 2.0 and allows you to have NTLM as yet another mean of authentication toghether with true local application accounts...
Abp.NHibernate
Polymer is a pioneering library that makes it faster and easier than ever before to build beautiful applications on the web
If you have a lot of data to show, but want to have the data show up as the user scrolls, you can use this infinite scrolling technique. This package will drop a new controller, view, scripts and sample data. Just navigate to http://localhost:xyz/InfiniteScrollDemo and you'll see the demo view. ...
Requester is designed to help you interact with JSON based web APIs. Nothing else. There is also Requester.Validation that you can use for testing purposes, to validate responses from APIs. Like statuses, schemas etc.
The GoogleRecaptcha is a .NET library used to integrate the Google Captcha into the web applications based upon the asp.net platform.
Automates the building of CRUD view models from decorated class definitions
AttributeRouting for self-hosted Web API lets you specify routes using attributes on your API controllers and actions.
.NET client for the Apereo Central Authentication Service (CAS)
An ASP.NET routing extension package with the support of flexible wildcard parameters, optional URL parts, extended constraints etc.
RequestReduce allows any IIS based website to automaticaly sprite background images into a single optimized PNG as well as combine and minify CSS and Javascript with absolutely no coding beyond a few config tweaks. RequestReduce excercises common best practices when serving its javascript, css and s...
SassAndCoffee is a package that adds SCSS/Sass and CoffeeScript compilation support to .NET, as well as minification support via UglifyJS.
MVC Turbine is a plugin for ASP.NET MVC that has IoC baked in and auto-wires controllers, binders, view engines, http modules, etc. that reside within your application. Thus you worry more about what your application should do, rather than how it should do it.
A micro web framework written out of curiosity in .NET, inspired by Ruby's Sinatra.
Configures SpecFlow to be able to easily use Selenium for WebTesting. Makes it possible to annotate a scenario with the browser it's supposed to work with. Contains SauceLabs IWebDriver implementation which has utility methods to update test status.
JavaScript URL routing for ASP.NET MVC. Allows you to use your ASP.NET MVC routes from JavaScript. Please refer to project site (http://dan.cx/projects/routejs) for more details, usage examples and sample code.