Python data, Leaflet.js maps
Open-source JavaScript library for mobile-friendly interactive maps
Large-scale WebGL-powered geospatial data visualization analysis
Traccar GPS Tracking System
Interactive, thoroughly customizable maps in the browser
MacOS application to spoof / fake / mock your iOS / iPadOS or iPhone
GeoServer repository
Open Source Routing Machine - C++ backend
Mergo: merging Go structs and maps since 2013
Open source cross-platform Java Visual Traceroute
Toolkit for working with and mapping geospatial data
GPS track editor for editing tracks and planning (multiple) day tours
Open source system for GPS tracking devices
An information system for cyclists in Berlin and Brandenburg
Deed and people mapping for genealogists and local historians
Minimalistic wide-open GPS-locator/tracker
Visualize deep ocean biogeochemical sediment samples in 2D and 3D!
Tool to work on map data, to check the data and generate your own maps
a simple virtual world editor
Offline vector map display ported from OsmAnd