Google has announced the subscription fee for Google Earth Pro has been eliminated, making this software completely free. It still requires a license key, which is provided on the download page.
System requirements:
PC – Windows XP, Windows Vista, or Windows 7
Mac – Mac OS X 10.6.0 or later
Features of Earth Pro:
View demographic, parcel and traffic data layers
Use advanced GIS data importing features to your advantage
Measure area, radius and circumference on the ground
Print high-resolution screenshots
Make compelling offline movies to share