free CADCAM

Is there any free cadcam software for mill ?
I know NativeCAM and librecad-freecad for cad something else ?

I use FreeCAD- the "Path" workbench got renamed to (more appropriately) "CAM" a while back- when searching for information on it, you may see references to both. It's adequate, getting better all the time (use the weekly builds!). Lots of little things that are obnoxious, but I haven't found anything better for any reasonable-to-this-hobbyist cost if you're doing more mechanical designs than organic/artsy. Being parametric on the CAD side and having adaptive toolpaths on the CAM side are huge for me. Definitely a learning curve, sometimes you have to go about things in unintuitive ways for various reasons to get what you want.

Depends heavily on what you're doing as well. Blender + BlenderCAM might be a good choice if you can manage the learning curve and are doing more organic/less "dimensioned" stuff. FreeCAD doesn't handle that so well IME.

If you're doing 2D/engraving type stuff, Inkscape or others might be better.

You might also end up using multiple for different things.

See if you qualify for one of the free license alternatives for Fusion 360. If you do I think it is hard to beat.
One can argue that it isn't free, at least it doesn't cost any money.