Google maps for block game
Traccar GPS Tracking System
Hibernate's core object/relational mapping functionality
An open source geocoder for openstreetmap data
GeoServer repository
Mybatis common mapper, easy to use
Geographic library
Open source cross-platform Java Visual Traceroute
Toolkit for working with and mapping geospatial data
Navigational Algorithms - Marine navigation
GPS track editor for editing tracks and planning (multiple) day tours
Open source system for GPS tracking devices
Set of Java interfaces for geospatial applications
A cartography program with parameter adjustments and gravity fonctions
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig
NMEA 0183 library for Java