Cross platform (lin/win/mac) geographical information system (GIS)
a parametric 3D CAD modeler
FlightGear Flight Simulator: free open-source multiplatform flight sim
fast C++ library for linear algebra & scientific computing
GPS log file viewer and analyzer
An intuitive molecular editor and visualization tool
A collection of packages providing extra functionality for GNU Octave
Free and open source pattern design software
A planetarium software that shows a 3D simulation of the night sky
32/64 bit multi-platform Ethernet S7 PLC communication suite
A circuit simulator with graphical user interface (GUI)
SUMO is a microscopic, multi-modal traffic simulation.
Your Private Offline Translator
For exploring cellular automata like Conway's Game of Life.
2D & 3D TeX-Aware Vector Graphics Language
PC based Oscilloscope and Spectrum analyzer using sound card
System dynamics program with additional features for economics