Lets you caption (set the title and description) for the contents of an entire album at once.
An undocumented source code commit apparently adds the ability to edit tags and filenames with this module as well.
Adds a new action item to the album actions.
This module may be downloaded from the GalleryModules here.
To install, extract the "captionator" folder from the zip file into your Gallery 3 modules folder. Afterwards log into your Gallery web site as an administrator and activate the module in the Admin -> Modules menu. Done!
Resize thumbs: http://galleryproject.org/node/105956