Google Satellite Maps Downloader is a cute tool that help you to get small tile satellite images from google maps. All downloaded small images are saved on the disk. You can view downloaded maps by Map Viewer Or you can combine them into a big bmp/jpg/tif map.
Note: The downloaded images are only for your personal purpose, non-commercial use.
It is very easy to use. Click here to see how to use it.
If you use Tracky or some other GPS softwares on your PDA, it is helpful for you to download cache files on your PC :) . You can also use the offline maps in GIS softwares such like Global Mapper, etc.
It is a shareware, for trial version, you can not download high precision images (For trial version, the max zoom level is 13; for registered version, the max zoom level is 21. But for most areas, the actual max zoom level is 18). It costs you only 29.95$!