Terrabrowser for MacOS X
For all you Mac enthisists out there the is Terrabrowser for MacOS X. Below are just some of the great features in this program.

• Three map types:
  • Color satellite maps (large urban areas only)
  • Black and white satellite maps
  • Topographical maps
• Map is draggable with the mouse or controllable via keyboard.
• Distance calculation option (hold down option and drag).
• Date of photograph and human readable location information provided (note that dates may be inaccurate since the date is only fetched for one of the map tiles, not all of them).
• Basic AppleScript support.
• Ability to save maps to a JPG file.
• Bookmarking ability for waypoints