Morpholio Trace - Morpholio Trace is widely called to be the dream software of the designers and architect.
LeoCAD - LeoCAD is a CAD program for creating virtual LEGO models.
Qlone - 3D scan any object with your iPhone or iPad
LDraw - LDraw is an open standard for LEGO CAD programs that allow the user to create virtual LEGO models...
DWG FastView - DWG FastView for Windows is a lightweight dwg/dxf drawing viewer and editor produced by Gstarsoft, no need of dwg format conversion, vector graph magnified without distortion and full compatible with AutoCAD DWG/DXF.
LDCad - LDCad is a multiplatform ...