dwg to vrml conversion seems like some kind of CAD/3D conversion from AutoCAD DWG format to VRML (Virtual Reality Modelling Language) format. Several 3D modeling tools like Creo Parametric or MEDUSA4 should support this just fine, but it is likely more options are available, albeit some might require special plugin.
Open DWG file Open VRML fileCreo Parametric (formerly known as Pro/ENGINEER) is a complete 3D CAD software solution by PTC
A dedicated 2D/3D CAD software