Microsoft has updated its Excel Viewer for Excel 2003.
With Excel Viewer 2003, you can open, view, and print Excel workbooks, even if you don’t have Excel installed. You can also copy data from Excel Viewer 2003 to another program. However, you cannot edit data, save a workbook, or create a new workbook. This download is a replacement for Excel Viewer 97 and all previous Excel Viewer versions.
You can download it at Download Details: Excel Viewer 2003.