a parametric 3D CAD modeler
LibrePLM integrates CAD editors in Odoo / LibrERP
Simple Road Design and Earthworks
A Windows-based viewer currently supporting CDR & 2D DXF files
3D/2D Concrete Reinforcement in Bentley MicroStation
Demonstrates a quadtree for spatial indexing of triangles
Design your own pottery for 3D printing in full color
ALST is a CAD for all imaginable logic systems (binary, ternary, etc)
A Linux CAD system
Open Source CAD