CAD files (.drw) from PRO/Engineer (Creo Parametric) can be easily exported to common DXF CAD exchange format either using the export function using the originals program, or with the use of a dedicated CAD software with support for DWR format or a CAD converter, like the CrossManager.
Open DRW file Open DXF fileA 2D Design is drawing and design tool
Creo Parametric (formerly known as Pro/ENGINEER) is a complete 3D CAD software solution by PTC
A CAD converter with huge format support
An old vector-based drawing software
A free graphics editor