I'm looking for apps that have faux materials in them like leather, wood, paper, etc. (Apple stresses "tactile" apps when guiding developers.) I'm trying to guide a graphic designer. What are some apps that I can show that get the point across?
Your question didn't specify free apps so here are a few paid apps:
There is a free app called Stylapps that is a showcase for stylish apps, though not specifically for apps that look like tactile materials.