I'm after a web application to display pictures, there are zillions of them out there but it's difficult to find one to match my requirements:-
Take an existing directory hierarchy of pictures and use it to organise the album/gallery. Don't copy the pictures, use them direct from the existing directory structure.
Must not require any write access to the pictures directory. The thumbnails and other information must be stored elsewhere.
No need for any picture manipulation at all, just a way to navigate through the hierarchy and view the pictures.
Preferably no database and the ability to use EXIF information but these are not absolute requirements.
It can use PHP, Python, Perl or anything really, slight preference for Python or PHP as I can modify/maintain it more easily myself then.