Here is some small tool which might come in handy when you need to quickly list images/files for client or just want to have some quick way of displaying pictures nicely.
You can change sorting order, thumbnail size and it can use gd or imagemagic (if its installed)
You just drop index.php in your directory of choice and it looks like this:
More info here: https://www.photo.gallery/blog/indexr
Demo: https://www.photo.gallery/demo/indexr/
Download here: indexr.googlecode.com