Many CAD programs support the IGES/IGS format and can work with it and export it to other CAD formats, including DXF format. Such iges to dxf conversion is mostly used for 2D technical drawings CAD conversions and can be done with pretty much every decent 3D modeling/CAD software.
Open IGES file Open DXF fileA CAD and Gerber conversion software
A Mac version of the popular 3D visualisation software
A set of 3D modeling tools
A 3D modelling software
A converter for 3D formats
A high performance 2D CAD program
Creo Parametric (formerly known as Pro/ENGINEER) is a complete 3D CAD software solution by PTC
A CAD converter with huge format support
A CAD/CAM for material working industry
An open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler
A dedicated 2D/3D CAD software
A 3D CAD translation software
A suite of CAD applications
A CAD drawing and CNC programming system