a parametric 3D CAD modeler
Link branch FreeCAD
The programmer's solid 3D CAD modeller
A free and open source multiplatform 3D parametric modeler
Cross-platform Open-source 2D CAD
A Windows-based viewer currently supporting CDR & 2D DXF files
2D CAD for precise drawing
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
2D Finite Element Analysis for Acoustics
Open Source CAD