Now this is certainly not the fanciest Website that I have ever seen. However, I think that the PHP browser project mentioned here shows some real promise.

What is it?
fileNice is a free php file browser, particularly useful if
you have a ‘dump’ folder on your server where you regularly
upload files and you want to be able to see what’s there.

See it in action here.

Features:
Folder specific slideshows of images (without page reloads).
File details
Send to Flickr
Folder comments
Some other stuff.

Installation:
Download the fileNice.zip, unpack and upload the folder
contents into the directory on your server that you want to
be able to browse. [Read the rest]