Barry has mentioned in the past how he wants to go gold prospecting...this app could be just the ticket for him! Plus as a bonus forHappydigger is a program which you can be used for cataloging archaeological finds. It is intended both for semi-professional use and by amateurs (e.g. metal detectorists) who want to keep track of their finds.
us pupsters, he would need to take a lappie with him...if you get my subtle drift!
It says it's for archaeological data, but I can't see why you couldn't use it for whatever data you wish to record.
Run via Menu->Utility->Happydigger