Cross platform (lin/win/mac) geographical information system (GIS)
GeoServer repository
GWC is a tile server and caching proxy written in Java
Open OSINT stack for monitoring, analysis, and risk detection
Toolkit for working with and mapping geospatial data
Open source system for GPS tracking devices
Multiplatform Ham Radio APRS and Mapping Program
Track your mobile device or cellphone via internet using OpenGTS/GPRMC
Source code for ArcGIS Viewer for Flex - a great application framework
a free and open map of wireless communicating objects