For Rhinoceros 6, 7 and 8.

RhinoCAM for Rhinoceros is a CNC machining plugin for Rhinoceros software. This plug-in is a combination of Rhino?s high ability to model with VisualCam?s machining skills. The result is a product that facilitates CNC milling, cutting and scheduling operations in the Rhinoceros environment. In fact, the flexibility of machining operations in this case is much greater. It is possible to use two separate products for CAD and CAM operations but has two major problems, one being the cost of buying an expensive product and the other being a separate software learning process. Two software are two separate learning processes and this is a waste of time.

http://www.mecsoft.com/rhinocam.shtml