Hi,
Does anyone have CNC software that works with .iges or .stl files?
Something akin to Alphcam or Mastercam or the like?
Is Fusion360 not up to it? It has a whole CAM facility
perhaps look at
CAM
http://f360ap.autodesk.com/courses
Creating Toolpaths and Programs (CAM)
How many axis are you milling with?