Archimatix lets you specify the type of Collider you would like on the GameObjects that it generates. All of the Unity Colliders are supported. In order to have a collider automatically enclose a series of meshes, in the node palette you can specify that all of the individual meshes being output are combined.

 

Archimatix also lets you use meshes as colliders only, by letting you specify that the mesh should not have a Renderer attached.