Google now offers downloads of its Google Earth Pro for Windows and Mac for free. (Once downloaded, sign in with your email address and apply license key "GEPFREE".) That's tied with our expired mention from three days ago (which required you to sign up) and a savings of $399 per year. Google Earth Pro is described as a "3D interactive globe that can be used to aid planning, analysis and decision making." It's also an effective way to traverse the globe without leaving your house. Click here for more information.