11 Amazing Google Earth Add-Ons

Google Earth Add-Ons - source

1. The Strangest Sights in Google Earth
   
2. Google Sightseeing
   
3.  fascinating layer of maps that shows how the world looked between 1680 and 1930. 
   
4. Mapping Craigslist Earthify
   
5. pinpoints the position of every known plane
   
6. live 3D tracking of every single plane flying over the United States.
   
7. a Webcam attached to the front of a cruise ship  
   
8. August 2008, Geocaching.com, a central site for the hobby, had almost 650,000
   
9. tracks the paths and positions of every major storm and hurricane
   
10. The original: Trojan_room_coffee_pot
    
11. current location of hundreds of satellites