a parametric 3D CAD modeler
Link branch FreeCAD
Cross-platform Open-source 2D CAD
A Windows-based viewer currently supporting CDR & 2D DXF files
3D/2D Concrete Reinforcement in Bentley MicroStation
Design your own pottery for 3D printing in full color
2.5D CAD CAM emphasis on CAM and toolpaths
Open Source CAD