GNU Health - The Free/Libre Hospital and Health Information System
CADAM is the open source text-to-CAD web application
A cross-platform statistical package for econometric analysis
An advanced network simulator to design and configure virtual networks
The Open Source CFD Toolbox
Computer Algebra System written in Common Lisp
FlightGear Flight Simulator: free open-source multiplatform flight sim
An intuitive molecular editor and visualization tool
GPS log file viewer and analyzer
Scanning probe microscopy data visualisation and analysis
A planetarium software that shows a 3D simulation of the night sky
An object relational-mapping (ORM) library for Java
A circuit simulator with graphical user interface (GUI)
a parametric 3D CAD modeler