Spectator is described as 'Simplifies access to satellite imagery from NASA, ESA and other providers. It gives you access to images archives, but also tracks satellites in real-time to give you information about next image acquisition' and is a Map service in the travel & location category. There are more than 10 alternatives to Spectator, not only websites but also apps for a variety of platforms, including Windows, Mac, iPhone and Linux apps. The best Spectator alternative is Google Earth. It's not free, so if you're looking for a free alternative, you could try Google Earth or Marble. Other great sites and apps similar to Spectator are SAS.Planet, GMap.NET, Mapline and Live Street View MAp Explorer .