This program needs the attached fltk-shared-libraries installed. Plus it needs this libexiv2 .pet.fotoalbum can be used to quickly view, organize, describe, tag, rotate, edit pictures and related files. It contains advanced features to search and find pictures, too.
Big collections can be handled easily (mine has grown to about 6000 pictures now).
You can export single pictures or groups of them with various options (with/without thumbnails, html indexpages, original size/shrinked, set IPTC/XMP metadata, ...).
It also depends in Imagemagick for some of it's functionality, (e.g. using Imagick's convert to create thumbnails). Imagemagick can be installed from this location, or from here.
To use, Menu->Graphics->FotoAlbum.
N.B. It's recommended to read the manual when you first start using the program. When first started, if you right-click on Root, then select Add->Files then, as an example, migrate to /usr/share/backgrounds & click OK, you can then save the album of pics in this directory as an .xml file.
If you've also installed imagemagick, then when you click on Root, a hidden directory will be created containing thumbnails of the parent directory.