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
NMEA 0183 library for Java
Tool for assessment of environmental services on farm scale.
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig