From Baby Universe:
EXDXF-Pro provides you with the capability to import CAD standard DXF files to Adobe Illustrator, and to export AI files to CAD, allowing you to make your data compatible in both applications. Illustrator CS4 includes basic DXF/DWG import and export functions, but the translator of Adobe Illustrator may not recognize or convert lines, curves and objects as you desire in every case. EXDXF-Pro can export and import to bridge Adobe Illustrator with the CAD environment to output DXF files with beautiful and accurate curved lines based on its own smoothing technology. It is the perfect tool for operators who work with both CAD and Adobe Illustrator.