DXF and SAT are fairly common exchange format used in CAD / 3D modeling industry. It is likely that many programs support both of these formats and can successfully transform data from one to another and vice versa. Some software known to be capable of dxf to sat conversion are listed here.
Open DXF file Open SAT fileA set of 3D modeling tools
3D CAD/CAM tool for product development
A CAD converter with huge format support