Nokia Drive hacked to work on other Windows Phones too
The most desirable one is Nokia Drive, of course, thanks to its offline voice-guided navigation capabilities in about 100 countries worldwide, including places where Bing Maps only shows the major highways.
The XAP file has been leaked in Chinese forums, and can only be applied to unlocked Windows Phones, of course, potentially voiding your warranty. It's interesting to see it working on the 4.7" HTC Titan, though, which just went on sale from AT&T. Detailed map of the US will take quite a while to download, as the full size is around 2GB.