A free and open source multiplatform 3D parametric modeler
The programmer's solid 3D CAD modeller
Cross-platform Open-source 2D CAD
A Windows-based viewer currently supporting CDR & 2D DXF files
Simple Road Design and Earthworks
Surface Explorer 3D plots mathematical surfaces in 3D.
French Geographic Information System
A set of freeware applications for viewing/processing P-CAD files.
Nesting SDK, Library
Automated detection of the unknown early map projection
Converts between many 3D data formats
Open DXFs with QCad
3D CAM program for CNC mills/lathes
library to read dwg & read/write dxf files
2D Finite Element Analysis for Acoustics