There are often questions in this NG about 3-D design software for various purposes.
If anyone is interested, there is a fully functional version of TurboCAD 7.1 on the cover disk of the December (yes I know!) edition of PC Plus magazine, which is now available.
As far as I know, this is general purpose design software, and is not aimed at any particular area - such as house design or mechanical engineering - although it can, of course be used for these things and many more.
Like all CAD software, it is likely to have a steep learning curve - but with the winter evenings coming on, I thought some people might be interested in having a go.
Roger