1)   CopanMobile for PalmOS 1.0.3
Copan for PalmOS enables you to COGO (do coordinate geometry), process field surveys, adjust map traverses, perform map/deed checks, calc curves and areas/perimeters, transform coords, interface with GPS, and import/export Ascii files. It's free.

 2)   Copan for Windows 10.05
Copan for Windows enables you to calculate coordinate geometry (COGO), process field surveys, adjust map traverses, perform map/deed closure checks, calculate areas and perimeters, transform coordinates, and import/export Ascii files. It's free.