Traccar GPS Tracking System
Tracks IOS and Android cell phones
GPS track editor for editing tracks and planning (multiple) day tours
Transport coordinate between earth(WGS-84) and mars in china(GCJ-02)
Open source system for GPS tracking devices
NMEA 0183 library for Java
Tool to work on map data, to check the data and generate your own maps
A C library for parsing/normalizing street addresses around the world
Java Library for working with gpx files
A library to generate short codes
A reference implementation of the Polish geobotanical grid
Trasforma coordinate da epsg per google maps
Ancient Chinese Clock (12-hour-day)
Convert your GPX coordinates to UTM reference coordinates