Google Earth Enterprise - Open Source
Lightweight GPS Logging Application For Android
Python data, Leaflet.js maps
Interactive visualization of plate tectonics.
GPSBabel converts and transfers data like waypoints, tracks & routes.
Offline vector map display ported from OsmAnd
... the open-source glide computer
Combines the high accuracy of AR with the scale of GPS data
Offline OpenStreetMap maps for iOS and Android
Interactive, thoroughly customizable maps
Free and open-source map hosting solution with custom styles
The bidirectional mapping library for Python
An open source geocoder for openstreetmap data
An application for using an external bluetooth GPS on Android devices
Multiplatform Ham Radio APRS and Mapping Program
OpenStreetMap tile downloader
Advanced mission simulation and analysis tool
Open source system for GPS tracking devices
GDAL wheels for python and C/C++ projects (Linux only)