Viking is a free/open source program to manage GPS data
An information system for cyclists in Berlin and Brandenburg
Visualize deep ocean biogeochemical sediment samples in 2D and 3D!
PCRaster environmental modeling software
Raster layer editing toolbar for ArcMap 10.x
QNetMap is the library for displaying the map and the objects on it
GPSBabel converts and transfers data like waypoints, tracks & routes.