If you noticed you didn't get a lot of replys. You are asking for a premium kind of product and EXPECT it to be FREE! Good Luck. I use Cubify Invent, the best $49 I have ever spent on software and I have a complete digital wood shop with lasers, 3d printers, cnc machines etc,. Yes there are free programs, but you certainly can expect to get exactly what you did not pay for. Just my 2 cents (for free of course). Russ