FotoTagger lets you easily add movable notes to individual elements visualized on images. The notes can be hidden in a click of a button so the original view remains intact. Moreover, the notes always stay with the image wherever it is shared.

FotoTagger Features
Identify people, places, and events on digital photos.
Mark notable details and comment specific objects.
Display your tags in a form of balloons. Create talking pictures, books of comics and image macros from your photos.
Publish annotated images to Blogger and LiveJournal.
Upload annotated pictures to Flickr and download them back to FotoTagger with Flickr notes preserved.
Organize images.
Find elements of images in a couple of clicks.
Create animated GIF files.