Best Tool For Information Gathering
A cross-platform statistical package for econometric analysis
A portable, multi-platform, command-line driven graphing utility
Computer Algebra System written in Common Lisp
FlightGear Flight Simulator: free open-source multiplatform flight sim
Software tools for processing taxonomic descriptions in DELTA format
A planetarium software that shows a 3D simulation of the night sky
2D & 3D TeX-Aware Vector Graphics Language
a parametric 3D CAD modeler
Astronomy CCD capture software
SUMO is a microscopic, multi-modal traffic simulation.
An USB programmer for PIC, dsPIC, AVR, serial memories
Astrology calculation, charting, and analysis
An interactive viewer for three-dimensional chemical structures.
GNU Health - The Free/Libre Hospital and Health Information System
Satellite tracking software
Schematic circuit editor for VLSI and Mixed mode circuit simulation.