Simple, drag and drop based utility, that is ready to create all the thumbnails you need.
Version: 4.4ThumbsUp is a simple, drag & drop based utility that creates thumbnails for a bunch of pictures and supports all image formats of Mac OS X and Quicktime (including PDF documents).
Operating System: Mac OS X
In addition size, antialiasing and quality are configurable. Note that this utility is not intended to be an HTML thumbnail gallery generator.