An open source harness for generating CAD models
CADAM is the open source text-to-CAD web application
A 2D CAD application for civil engineering , built with Free Pascal
A math-inspired CAD program in haskell. CSG, bevels, and shells
Cross-platform Open-source 2D CAD
converts between IGES file and text file
OpenNum lets you distribute solvers with a nice graphical interface
CAD 2D for Land Surveying and Civil
A designer’s program for describing parts of the building
Simple CAD program
Tekla IFC Tagger
Cuts 3D objects from polystyrene foam (EPS/XPS)
Drawing robot for electrical interconnection diagrams in DXF.