Open source CAD engine that uses JSON as file format. The engine convert parametric commands to 3D data. The rendering is very fast and can be dynamically changed. The format is very simple and can be created with any text editor..
For now it only supports very basic commands as sketches and extrusions.
Further development consist of more parametric commands and the development of a editor.
Demo : http://yellow3d.com/apps/y3dcad/ (Beta)