MozoDojo is a photo-mosaic creator. You give it a model image and an image database, and it tries to build a mosaic looking like the model image by picking up the tiles in the database. The image database may be a simple folder, an iPhoto or Aperture album, a sequence, a bunch of CD covers from iTunes, or a Delicious Library shelf.
MozoDojo is free for personal use.
What's new in MozoDojo
fixed incompatiility with Delicious Library 2.1, that caused a crash at launch.