Build your own GPS unit
Create, edit view GPX tracks (in the background - online maps)
A C library for parsing/normalizing street addresses around the world
CALCULO DE ESPIRAL CURVA ESPIRAL SCT 2018
CAD 2D for Land Surveying and Civil
Application to browse and visualize your GPS files
Land survey field crew data management for .RAW and .JOB file types.
CAD 2D for Land Surveying,Civil and more
a free and open map of wireless communicating objects
... the open-source glide computer