Open source cross-platform Java Visual Traceroute
Viking is a free/open source program to manage GPS data
Navigational Algorithms - Marine navigation
GWC is a tile server and caching proxy written in Java
Showing The Amateur radio Repeaters Tool
Bootable linux distro for Geospatial Applications
GPS track editor for editing tracks and planning (multiple) day tours
... the open-source glide computer
An information system for cyclists in Berlin and Brandenburg
Open Source Desktop GIS with Surveying and Cartography Functionality
Open OSINT stack for monitoring, analysis, and risk detection
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig
Build your own GPS unit
Automated detection of the unknown early map projection
A Guide of the Trees of Barcelona City