www.renderosity.com/mod/gallery/index.php   Smoke and flames.

www.renderosity.com/mod/gallery/index.php   More smoke and flames.

These are oldies.  The smoke plume can be made in any modeler just make an irregular tube and use a dirty cloud texture on it.   The fire and explosions are just an irregular object that kind of looks like a rock.  Easy to make in any 3d app.  Then  you layer a smoke textured one or two with a fire textured one or two.  Rotating and resizing as you find artistically satisfying.  The whole affair can even be animated.

Free men do not ask permission to bear arms!!