Since quite some time i am maintaining a version of Cacheme in the extras-devel repository. It was initially written for MeeGo, but the lack of any meego hardware made me return to maemo and the donation of a c7 made me port it to symbian (which actually is the nicest hardware for this as it has a megnetic compass).

It's a pure qt/qtmobility geocaching app. It started as a meego touch based app which i soon scraped as nokia marked meego touch as deprecated. Then i did some trial with qml which at that time there weren't any widgets or the like and i didn't want to code the entire ui myself. So i ended up with plain qt.

Here you go:
http://maemo.org/packages/view/cacheme/

Also available for Symbian, Windows, Linux and MeeGo.