Free and open source pattern design software
Simple Road Design and Earthworks
LibrePLM integrates CAD editors in Odoo / LibrERP
A Windows-based viewer currently supporting CDR & 2D DXF files
Demonstrates a quadtree for spatial indexing of triangles
Open DXFs with QCad
An Open source Analysis and SImulation Toolbox for Fuel Cells
2.5D CAD CAM emphasis on CAM and toolpaths
CNC machine code generation for 3D models