Top 20 NuGet 404 Packages

Provides a user-friendly '404' page whenever a controller, action or route is not found in your ASP.NET MVC3/MVC4/MVC5 application. A view called NotFound is rendered instead of the default ASP.NET error page.
A module to support SEO friendly, multi-site and multi-language enabled custom error messages for Sitecore.
A module to support SEO friendly, multi-site and multi-language enabled custom error messages for Sitecore.
Service Fabric Not Found MiddleWare. https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-reverseproxy Keyword: X-ServiceFabric
Owin middleware to return 404 responses
Provides a user-friendly error page whenever a controller, action or route is not found or encounters an error in your ASP.NET MVC5 application. Custom views are rendered instead of the default ASP.NET error page.
Provides basic error pages for your IIS project
Asp.net Web Crop Image Control allows developers to build image cropping functionality easily on their projects. You can seamlessly crop images and yet provide your visitors the most user friendly web interface by simply doing drag and drop in your projects.
Sitecore Multisite Http module, allows mulitsite handling of 404, & 500 errors, along with custom robots.txt generation
A 404 handler which allows you to spesify an Umbraco documenttype as a 404 page. This allows us to use actual umbraco content as content for our 404 page. Getting started: Web.config: - Add httpErrors existingResponse="PassThrough" to the webServer section of your webconf...