A Cross Platform and Open Source Electronics Design Automation Suite
Open-Source Shoemaking
Cross-platform Open-source 2D CAD
Open Source Planar Linkage Mechanism Simulation and Synthesis Software
AVR simulator IDE
Open DXFs with QCad
Free multiphysics simulation software package
3D CAM program for CNC mills/lathes
qnutCNC is a program to control the ethernut development board
Cuts 3D objects from polystyrene foam (EPS/XPS)