It sounds like Gallery is exactly what your are looking for.
Excellent application, highly customizable.
http://gallery.menalto.com/

I built my photo site with Gallery and a standard template. If you want 
to check it out:
www.sonoranphoto.com

Peter



Mark Phillips wrote:
> I am looking for a simple web photo album app with the following 
> attributes:
>
> * Open source
> * Linux, Apache, Java or PHP or Python, or .......
> * File system/directory hierarchy
> * No database needed
> * Display thumbnails, click on thumb to see larger picture
> * Right click on image and download full size image
> * Users add comments and/or ratings
> * Clean user interface - no adds
> * Don't need a complicated admin page (probably don't need one at 
> all!) command line OK
> * Rotate images (losslessly) for those pics that are sideways
> * Drop the pics in a directory and the app does all the 
> work..(generate thumbs, etc)
> * Slide show mode
> * Search based on title or tags
>
> If you have used something like this, please let me know. There are so 
> many out there I am getting swamped by the endless choices!
>
> Thanks!
>
> Mark
>
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