Viking is a free/open source program to manage GPS data
utilities for cadastre system
Minimalistic wide-open GPS-locator/tracker
Sight Reduction for Air Navigation with Python
Analysis and display of Census, business, government attribute data
Shows local Websites from OpenStreetMap
a space-time interpolation geostatistical tool
FastVersion is a Qgis plugin for data versioning in a Postgis database
QNetMap is the library for displaying the map and the objects on it