Link branch FreeCAD
Cross-platform Open-source 2D CAD
DXF2GCODE: converting 2D dxf drawings to CNC machine compatible G-Code
Static and Dynamic Structural Analysis of 2D and 3D frames.
CFDTool - Easy to Use Computational Fluid Dynamics (CFD) Toolbox
Extensible Line-drawing & Polygon-filling Rasterization Libs for Java
2D CAD especially designed to draw steam locomotives
This plugin exports G-Code for a wirecutter
A finite element data exchange system
Open Source CAD