OziGeocacheUK
I've been tinkering around for a while wrapping the API to OziExplorer in Java, as chronicled both here and on my work blog. I've finally knocked together an application that uses it. OziGeocacheUK integrates information from GeocacheUK.com and Geocaching.com into OziExplorer. OziExplorer is a GPS mapping application and GeocacheUK is a database of geocaches in the UK. Hopefully this post will help google steer anyone who is looking for such a thing towards it ;-)