fluent-apps
Apps for a more consistent experience
Apps are organized into folders, which contain screenshots and a Readme explaining the use of each.
All apps are open source. I recommend using the Scoop package manager; it is super easy to use and has most of these apps.
Check out the UWP Community projects for a mega-list of such beautiful apps.
If you're looking for my personal configuration files, they can be found in my dotfiles repository.
The above screenshot was taken with Paint 3D. This Reddit thread explains how in super easy steps.