On Sat, Jan 03, 2004 at 01:14:47PM +0800, Nan Phin wrote: > any recommendation? For 2D, there is QCAD (http://www.qcad.org). It's quite a mature qt app, good for doing office/house as well as cut outs for models and woodwork. For 3D, only one app lignumcad, http://lignumcad.sourceforge.net/doc/en/HTML/index.html. It's based on a mature open sourced SDK (OpenCASCADE), but I've not familiar with 3D cad tools to know how good it is.