Top 20 NuGet routing Packages

Core functionality for AttributeRouting Web API packages.
An ASP.NET routing extension package with the support of flexible wildcard parameters, optional URL parts, extended constraints etc.
AttributeRouting for self-hosted Web API lets you specify routes using attributes on your API controllers and actions.
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.
.NET library with simple routing inspired by express.js for Katana applications.
JavaScript URL routing for ASP.NET Core (vNext) and MVC 6. 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.
A router component for React and Elmish that is focused, powerful and extremely easy to use.
A dotnet-new template for Carter applications.
JoyMoe.Common Attributes for Asp.Net Core MVC
RestfulRouting is a routing library for ASP.NET MVC based on the Rails 3 routing DSL.
RouteMagic.Mvc is a library of useful Routing helpers specific to ASP.NET MVC. See http://haacked.com/archive/2011/01/30/introducing-routemagic.aspx for more information.
Easily map ASP.NET MVC routes to lowercase URLs! Does not affect casing of the querystring, if one exists. Includes support for MVC Areas, as well as experimental support for ASP.NET Web API HTTP routes. See the Project Site for important usage notes.
AttributeRouting code templates for MVC 4 adds controller templates that use attribute routes on their actions.
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.
DRUM - Direct Route URI Maker for ASP.NET Web API
Makes ASP.NET MVC routes dashed (hyphenated) and lowercase. This is a fork of Ata Sasmaz's work. Bugs are fixed and new features are added. For initial one line configuration please read Project Information link. More info: https://github.com/salarkh/lowercase-dashed-route/
Enable attribute routing for Nancy project, and build route URL with compiled-time checked lambda expression.
OpenLR library for .NET.
SPA fallback middleware for client-side routing
A Simple C# Wrapper around two of Eniro's API calls. Geocoding and Routing