http://www.speleo.qc.ca/auriga
Auriga is a Palm OS cave survey freeware performing input data conversion into Cartesian coordinates as well as map display (topographical path only).
Auriga can be used as:
an electronic notebook to store numeric survey data while in the cave
a scientific calculator to convert survey shots into Cartesian coordinates
an electronic survey data backup device until getting back to the home base PC/Mac
a display tool to view the cave (top view or cross section with pan and zoom features)