GeoServer repository
Toolkit for working with and mapping geospatial data
GWC is a tile server and caching proxy written in Java
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig
Open source system for GPS tracking devices
Set of Java interfaces for geospatial applications
A reference implementation of the Polish geobotanical grid
GeoData Web Editing [core SIG Web]
Java Swing component for integrating OSM maps into your Java app.
Source code for ArcGIS Viewer for Flex - a great application framework
LGPL GML parser
Customization of OpenGTS look and feel
a free and open map of wireless communicating objects
A map-based discussion forum ("argumentation map")