A simple PHP script which displays folders and files in a well formed list, you can control the look and feel of the whole page by simply editing the Stylesheet.
PHP enabled server and browsers that support latest Web Standards.
How it looks?
For live demo, you can go here.
Download the zip file here (12KB), the package contains all the files you need. Just place them in the directory you want to enable directory listing, the script will done all the rest for you.
You can rename index.php to the filename you want, just remember to set it as the default loading page.
To customize the look and feel, you can edit the listr.css for styling. You can even edit the html template inside index.php (start from line 243).