Hi andras,
Most CAM software will be NURBS based, and support loadfing STL's.. In a NURBS environment, an STL will be a "Dumb Solid" (not editable). Some may support the polygon data too and manipulate it.

Whether the output of Paracloud generates what you want/need or not, is the question... Paracloud will make stuff that would be very hard to do with NURBS tools. Same with Polygon software... For certain types of stuff though, a poly model will not be a good model to use due to it's inaccuracies or size.