A CAD application for creating virtual LEGO models
An open source harness for generating CAD models
a parametric 3D CAD modeler
Beginner-friendly CAD software available for both web and desktop.
CAD Application entire developed in Python
very good CAD software
A math-inspired CAD program in haskell. CSG, bevels, and shells
Static and Dynamic Structural Analysis of 2D and 3D frames.
converts between IGES file and text file
OpenNum lets you distribute solvers with a nice graphical interface
CAD.