HoudahGeo is a Mac utility that provides you with a solution for geotagging your favorite pictures. This program might prove to be of good use if you wish to organize photos you took in various places.
The application lets you choose between multiple geocoding and geotagging modes. You can use the integrated map to find the location where you took the photo, utilize a GPS device or your iPhone to identify and load the position, etc.
HoudahGeo is simple to use and features easy-to-configure geotagging settings. So, you don't need much computer experience in order to work with this program. You can drag-and-drop your pictures over the interface, import track log files of various formats, choose from multiple map representation modes (Hybrid, Satellite, etc.), and much more.
In addition, the utility supports various output formats if you wish to export the information to your local directories. The app works with formats like EXIF, KML, CSV or GPX. You can also share your geotaggs on the Flickr website.
In conclusion, you should definitely give HoudahGeo a try if you're looking for a simple way to sort your pictures based on the locations you took them on.