GMapCatcher is an effective and smart offline maps viewer.
This handy freeware downloads tiles automatically from many providers such as: CloudMade, OpenStreetMap, Yahoo Maps, Google Map. It displays them using a custom GUI. User can view the maps while offline. GMapCatcher doesn't depend on google-map's java scripts so it should work even if google changes them. It also provides a downloading tool.
GMapCatcher is written in Python 2.6, can run on Linux, Windows and Mac OSX.
maps.py is a gui program used to browse google map. With the offline toggle button unchecked, it can download google map tiles automatically. Once the file downloaded, it will reside on user's hard disk and needn't to be downloaded again any more. At release 0.02, it use multi-threaded downloader and can be faster.
After version 0.04, user can force GMapCatcher to re-download old map tiles by checking "Force update". If a tile is older than 24 hours, it will be re-downloaded.
download.py is a downloader tools that can be used to download google map's tiles without gui. maps can use files it downloaded without configuration.