.NUPKG File Extension
File Type 1NuGet Package
What is a NUPKG file?
File used by NuGet, an extension for Microsoft Visual Studio that provides an interface for managing third-party libraries for .NET projects; contains packaged source code that can be used for developing program components.
NOTE: NuGet is formally called the NuGet Package Manager. Popular NuGet packages include Microsoft Entity Framework, jQuery, and JSON libraries. You can add NuGet in Visual Studio's Extension Manager window ().
File Type 2NetUpdate Package
.NUPKG File Association 2
Update package used by NetUpdate, a software utility used for updating Intego applications; may contain a patch or content pack for software titles such as VirusBarrier, Personal Antispam, Personal Backup, FileGuard, and ContentBarrier.