RhinoCAM 2018 v8.0.028 for Rhino6
RhinoCAM 2018 v8.0.425 for Rhino5

RhinoCAM is a Rhinoceros plug-in that runs completely inside of Rhino. This plug-in is a general purpose machining program targeted at the general machinist. RhinoCAM includes 2-1/2, 3, 4 & 5 axis milling and hole making operations. It comes with hundreds of post-processors and additionally a post-processor generator to create user definable post-processors.

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