Before downloading, please read the Software License carefully.
MINOS is a 3D solid package. But if you need a good 2D package in freeware, you can try
CadStd from John Apperson. With CadStd, you
will have a lot of drafting functions that are missing in Minos.
If you are interested by French billiard, check out
Laurent Buchard's home page. Laurent has developped a very impressive billiard simulator.