Npackd is described as '(pronounced "unpacked") is an application store/package manager/marketplace for applications for Windows. It helps you to find and install software, keep your system up-to-date and uninstall it if no longer necessary' and is a popular software installer in the os & utilities category. There are more than 25 alternatives to Npackd for a variety of platforms, including Windows, Linux, Web-based, Mac and BSD apps. The best Npackd alternative is UniGetUI, which is both free and Open Source. Other great apps like Npackd are Chocolatey, Ninite, GNOME Software and Snap Store .
As of Feb 13th 2019, it has 6314 packages vs 1190 in Npackd. It's built on NuGet which Microsoft created and uses for Visual Studio and PowerShell, so it's as supported as it can possibly be. It's completely scriptable, but there's also Chocolatey GUI if you want a graphical interface.