Cross platform (lin/win/mac) geographical information system (GIS)
Minimalistic wide-open GPS-locator/tracker
GDAL wheels for python and C/C++ projects (Linux only)
Interactive visualization of plate tectonics.
Interactive, thoroughly customizable maps
See your friends from VKontakte on the map
Geostatistics and geosciences modeling software
Satellite Emulator
QNetMap is the library for displaying the map and the objects on it
A gui for linux users of miniHomer, a GPS tracker
A frontend for gpsbabel
In-flight navigation (and more) for private pilots (Linux).