PSP-Maps is a homebrew application to bring Google Maps, Virtual Earth and Yahoo! Maps to the PSP with a simple interface. This program is not using the Google Maps API (except for address search), it is retrieving the images directly using the wireless connection.
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You can search for an address, add/load favorites, or just move around on the map. There is also a local cache which allows you to browse the maps offline.
PSP-Maps is released under GPL so the source code is available.
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