MSIX Hero is a free tool built by Marcin Otorowski. This is a community tool that is also mainly used in the package testing process.

msix hero gui

Covering some of the same features as MSIX Commander, you would be safe to assume that this is also delivered as an MSIX package. The application does not seem to be open source. You can download the tool from MSIX Hero website.

The download is available in two forms - one of them supporting the automatic detection of updates using the same web style we will probably see software vendors using in the future. Currently, the tool requires you to download msix.core as an additional download.

The tool seems to be most useful during the smoke test phase when testing new packages, but also has some simple package editing capabilities.