Open source / Open Standard CAD development?

[Shawn Rutledge]

On Wed, Mar 5, 2008 at 2:36 PM, Mats Eriksson <datorfixarn at gmail.com> wrote:
>  * Does there exist any "usable" open source CAD systems? (Is perhaps
>  Open CASCAE a viable semi-open http://www.opencascade.org/ option?)

The previous suggestions that IMO had some relevance were Blender and
BRLCAD.  I hadn't heard of OpenCascade but it looks interesting.

There are other open-source CAD packages with not enough features
(2D-only, specialized for PCB layout, 3D rendering systems that don't
have the to-scale accuracy features of a CAD system, etc.)