Any way to apply simple physics... to a rig?

Hey everyone,

So I am modeling a character who has a lot of cloth on him that needs to be animated. Since all the cloth would be too much for applying real cloth simulation (at least for the scope of this project), I was wondering if there was a way to have simple armature simulation without having external objects influencing it? Like ragdol physics! That way, i can have multiple cloth pieces share the same simulation data.

Basically my goal is to make this as simple as possible.