FreeCAD drawings (.fcstd) can be exported by the program to all kinds of other 3D data, including ISO STEP product data files (.stp, .step). Unfortunately, except for FreeCAD, we have no information about any other program capable of direct fcstd to step conversion.
Open FCSTD file Open STEP fileAn open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler