Get 3D app call Groboto
GroBoto has succeeded in building systems that combine Real Time, True Geometry Boolean Editing with the capability of generating High Fidelity, Beautifully Structured Meshes Automatically.
These systems are both Robust & Sophisticated Able to Automatically Mesh any Arbitrary, Complex arrangement of Primitives & Booleans and further, to Smooth & Stylize those Meshes creating sublime forms.
http://www.groboto.com/v3/index.html
I think its a great app looks easy to use