Viking is a free/open source program to manage GPS data
Toolkit for working with and mapping geospatial data
An information system for cyclists in Berlin and Brandenburg
Open source system for GPS tracking devices
Analysis and display of Census, business, government attribute data
Multiplatform Ham Radio APRS and Mapping Program
Geolocation Postcode Algorithm
Scientific research work of Francesco Montorsi,Univ. of Modena, Italy
Cartography tools for ARC/INFO