OpenFoto is a free and open source PHP photo gallery requires no database. Images can be uploaded full size via FTP and are compressed and resized automatically on the fly with this PHP project. Folders can also be organised using drag 'n' drop.

Features of OpenFoto:
- directory ordering by building arrays of files & folders, this will allow directories to be placed before files - and perhaps offer view ordering options.
- paypal download shopping system: click to add to paypal cart: purchase one or many, emailed full-res download link, would need to reorganise file system a little.
- image exif data display should be simple enough, but requires a specific php set-up, so more generic route required.
- rss feeds: all folders and images per gallery - something for the search engines and feedburners to eat.
- search facility: plan to develop a file & folder based search engine, might need to add tags to files or associated tiles.
- expansion of template customisation via template/xxxxx/settings.php & user/xxxxx/settings.php - to allow extra control over gallery look and feel.