There are 2 repositories under skeuomorph topic.
Skeuowie (or Skeuwie) is a UNIX desktop environment with the main goal of full skeuomorphism.
An awesome list that curates the best Neomorphism (Neumorphism) Concept & Neumorphic libraries, tools, design, inspiration, tutorials, articles, and more. (Neumorphic - iOS | Android | Flutter | React Native | Xamarin | Web | Design Inspiration)
The module for my life story project that contains my iOS 6 images.
Made a switch for fun
Flutter test app for implement https://dribbble.com/shots/7994421-Skeuomorph-Mobile-Banking