From WhiteTown Software:
XLS (Excel) to DBF Converter allows you to convert your XLS (Microsoft Excel) files to DBF format. MS Excel up until 2007 version used a proprietary binary file format called Binary Interchange File Format (BIFF) as its primary format. Excel 2007 uses Office Open XML as its primary file format. You can select tables for export and set necessary options. The program can read both old XLS file and Excel 2007 files and convert then to dBase III, dBase IV, FoxPro, VFP and dBase Level 7 formats. The program supports command line interface. So, you can run it with necessary parameters in a batch mode from the command line or from Windows scheduler without human beings. Besides, the Site license includes a DLL which you can use from your own application.