OpenJUMP is an open source GIS software written in Java. It is based on JUMP GIS by Vivid Solutions.
It is a Vector GIS that can read rasters as well. It is not just another free demo viewer, but you can edit, save, analyze etc. with OpenJUMP. It works, even with medium size datasets, and with professional touc. It provides a GIS API with a flexible plugin structure, so that new features are relatively easy to develope around the sound mapping platform. It utilises standards like G...

Cinnamon is a spatial analysis library.

Debrief has been created to perform a variety of functions related to maritime tactical analysis, ranging from detailed analysis requiring accurate calculation and presentation of bearing and bearing rates, through the collation of graphical information to produce a plot for insertion into an analysis report, to the recording of animated dynamic sequences for replay in a presentation. The tool was originally produced to support submarine analysis, but has been expanded in the last 8 years to su...

KNOwledge-based TechnologyThe use of traditional GIS technology is not always sufficient for answering complex spatial problems. Knowledge-based systems can be used to answer some of these problems. I expect this project to contain some interesting, experimental code bits which help solve these problems.

This project will demonstrate and develop several examples for using the Google Earth API as the front end to geoprocessing tasks from a variety of GIS software suites, both commercial and open source.

Using the Google Earth API with ESRI's JS APICheck it out!

Blog entry about the Earth API / ESRI Demo