GeoTagger

iPhoto often has some pictures without GPS tagging on them, typically because pictures from a camera without GPS was used to take them.  Fixing in iPhoto is cumbersome.  With GeoTagger you scan a part of your picture library for pictures without a GPS tag, and analyse them.  When a set of photos appear between two pictures with geo-tags within a given distance and time from each other, these are grouped as a set between "brackets".  You can then choose to use the bracketing geotags on the set, or on some of them. 

Photos that are not within a bracket are put in a left-over group, and displayed with each preceding photo before and after with a tag (even outside the bracketing limits), so that you can choose the location of either of those for the given picture.  Or you can manually assign a location, which then becomes a new tag for grouping.  If you tag both ends of an un-tagged sequence with the same location and re-scan, they will be picked up for set assignment.

Now supports English, German, Spanish, and Norwegian.