Primitive substitution in the minifig arm

[Orion Pobursky]

I do not know about any other generator, although in LDCad makes it easy to build your Fig from scratch, doesn't it?

Yes. Part snapping does make building a fig fairly trivial. It's even easier if you use the generic shortcut, inline it, and then change the head, arms, torso, and legs via double click substitution.