This is a free tool to see if your PC meets the requirements to run Windows 11, as specified in this document from Microsoft.
In addition the tool checks to see if your PC can support (gaming) features like AutoHDR and DirectStorage, as outlined on this page from Microsoft.
A screenshot of the tool:
Currently this repository will hold the releases and translation strings for the tool.
More information on this tool can be found here: http://bytejams.com