Folder Preview 1.8.7
Quick Look is invaluable, but it doesn’t always provide all the information you need. Using it on a folder only gives you some basic details, but nothing useful about what's inside.
Folder Preview is a Quick Look extension that lists the contents of folders when you preview them. You’ll be able to see files, with some basic details about each item, and subdirectories can be expanded automatically to give you a quick overview of the folder structure.