Two nice tools for editing photo meta-data:

• MMISoftware – PhotoGPSEditor
  PhotoGPSEditor is an easy to use meta-data editor for photo files, plus it can match data from GPS (gpx or NMEA) files. The program is freeware, however, donations can be made to help support future development.
  (tags: software photo metadata editor gps photogpseditor)
• MMISoftware – PhotoInfoEditor
  PhotoInfoEditor is an easy to use meta-data editor for photo files. The program is freeware, however, donations can be made to help support future development.
  (tags: software macosx photo meta-data editor geocode)