There are several projects called "FreeCad". There is at least one on sourceforge and there is the one programmed in smalltalk by a person who goes by the name of "askoh". I have been confused by this in the past. It appears that the Opencascade libraries are starting to be used a lot. Tomcad, FreeCad (sourceforge), Freeengineer, and LignumCad are some that use opencascade. I like the idea of using an existing group of code to accelerate developement of a CAD program. I am not a programmer, but kind of watch these things. Dan