A set ot tools for surveyors addon to many CAD environments
DXF2GCODE: converting 2D dxf drawings to CNC machine compatible G-Code
Aircraft Configuration tool
CFDTool - Easy to Use Computational Fluid Dynamics (CFD) Toolbox
Free 3D Mobile CAD
Precise gear geometry generator for spur and helical gears
An easy and flexible mathematical programming environment for Python.
Portable feed & speed calculator for turning and milling
Open Knowledge on engineering development.
3D CAM program for CNC mills/lathes
A package for Isogeometric Analysis in Octave and Matlab