For us folks who like to stay Free and use the Blender 3d program over every other costly options!
Empty Object, Background Image, Parenting Objects, Joining Objects, Separating Objects, Spin, Spin Duplicate, Screw, Loop Cut And Slide, Knife Cut Tool, Rip Tool, Subdivision Surface Modifier - Subsurf. All credit for this set of video tutorials belongs to Neal Hirsig.