Viking is a free/open source program to manage GPS data
An information system for cyclists in Berlin and Brandenburg
The full-featured, easy-to-use desktop GIS with real processing power!
Raster layer editing toolbar for ArcMap 10.x
compeo++ - Manage Flytec/ Bräuniger Instruments
GPSBabel converts and transfers data like waypoints, tracks & routes.
Open 3D earth viewer with GPS support