As a gallery generator fpgg is obviously expected to resize pictures and create (X)HTML pages. In detail, fpgg can:
Use templates to index, picture category, and picture view page.
Use user given information about each picture (e.g. title and description).
Create index page and picture category index page with automatically generated thumbnails to all pictures (within that group)
Include list of picture categories to index page
Create view page for each picture
Automatically resize original picture to given size for view page
Include links to next and previous picture
Include picture information such as user given title, description.
Include link to original picture
Include links to categories this picture belongs to
Use any command line invoked application to resize and otherwise process pictures.
Use any command line invoked tool to strip unwanted EXIF data from pictures.
Generates valid XHTML 1.0