Open source cross-platform Java Visual Traceroute
... the open-source glide computer
NMEA 0183 library for Java
Advanced mission simulation and analysis tool
Flights, vessels, satellites and trackers realtime 2D/3D display
Distributed Version Control System for Geospatial data
OTB is an open-source C++ library for remote sensing images processing
Geospatial Distributed Version Control System
MeteosatTool is for visualization and processing meteo satellite image
FAA digital chart viewer for iPhone and iPad
Aircraft navigator with HSI for TomTom devices
In-flight navigation (and more) for private pilots (Linux).