FreeCAD is LGPL.
LibreDWG is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
Look, why dont you make a Plugin for these two cads. I dont see why you should have to make v2 compatible.
On Fri, Feb 10, 2012 at 1:51 PM, Jean-Peer Lorenz <address@hidden>
James Michael DuPont
Member of Free Libre Open Source Software Kosova http://flossk.org