One of the major innovations in the latest release of iPhoto was the addition of Geotagging to your photo collection.
However, if like me you don't use iPhoto, you'll need an alternative way to automatically add geotags to your photos. GPSPhotoLinker adds GPS positioning and location data to your photos as long as your camera has GPS tagging enabled. The latitude and longitude recorded by your GPS unit are linked and saved to your photos. GPSPhotoLinker automatically enters the city, state and country into the metadata.
Considering it's completely free to use GPSPhotoLinker is an excellent application for anyone that wants to add geotags to their photo collection.