Are there any free modelling applications?

A version of S3D released only to some has the ability
to view and edit the zones I'm told.

And a zone editor by Ref released only to a few will do it also.

Both programs are mostly Alpha versions so not released to the general population at this time.

I've also heard the NYGM team has something also.
That is sheer rumor as far as I know.
I'll not pretend to have any facts on that.

I do use Ref's Zone Editor.
I've also asked him to release it as is.
It's the best out there that I have seen.

Ref, in my opinion, has created a fantastic tool for doing zone work.
It is a bit rough until you understand it and work with it.
But it is a masterpiece of programming for SH3 and SH4.

And it's a old program as far as how long it's been around.
If Ref ever releases it?
I'd be more then happy to handle the user support for it.

Here's what the boxes and spheres look like.