Google Earth Pro gratis

Teneis que registraros aqui
https://geoauth.google.com/gev0/free_trial.html

y google os enviara una clave para luego descargarlo de aqui
http://www.google.com/earth/download/gep/agree.html

Visto aqui

http://www.forbes.com/sites/amitchowdhry/2015/01/30/google-earth-pro-is-now-available-for-free/
http://wwwhatsnew.com/2015/01/30/google-ofrece-google-earth-pro-de-forma-gratuita/