Organic Maps is a free Android & iOS offline maps app for travelers
GPS log file viewer and analyzer
GPS navigation software for Windows Mobile & WinCE devices.
Minimalistic wide-open GPS-locator/tracker
Plugins for OpenCPN
Open Source Marine Chart Plotting Program
Satellite Emulator
A tile-based map viewer with support for GPX files.
A software to manipulate RINEX 3 files
A gui for linux users of miniHomer, a GPS tracker
A library for Ublox serial message parsing
Plugin for OpenCPN
In-flight navigation (and more) for private pilots (Linux).
compeo++ - Manage Flytec/ Bräuniger Instruments