OpenGTS (Open Source GPS Tracking System) is a full featured web-based GPS tracking system for your fleet of vehicles. It supports OpenLayers and other map providers, detail/summary Reporting, and various GPS tracking devices.
Geoportal Server is a standards-based, open source product that enables discovery and use of geospatial resources including data and services.
G2C (Geospatial to Civil) The LandGML Interoperability Experiment initiated by Autodesk, U.S. Army Corps of Engineers Engineering Research and Development Center, and Galdos Systems. this open source tool transforms LandGML into LandXML documents.
Hanghe is a marine navigator supporting BSB/KAP chart, GPS, multiple chart display, ship tracking. It is developed in Java 1.6.
Nazooke! lets people track their friends, vehicles, animals, or other things. It sends the user's position in defined intervals to a remote server which will show the user's position on a map.