Geographic library
Viking is a free/open source program to manage GPS data
GDAL wheels for python and C/C++ projects (Linux only)
A C library for parsing/normalizing street addresses around the world
Analysis and display of Census, business, government attribute data
Geodesy based library (geodetic and geocentric functions)
A map maker via online map services
Multiplatform Ham Radio APRS and Mapping Program
Shortest Path Navigator with Directions and Distance
MeteosatTool is for visualization and processing meteo satellite image
Visualize data from the opencellid.org project
Tool-Kit aplication for system Geo Integrations