Perl Module to create Excel 2007+ XLSX Fileshttp://search.cpan.org/dist/Excel-Writer-XLSX
The "Excel::Writer::XLSX" module can be used to create an Excel file in
the 2007+ XLSX format.
The XLSX format is the Office Open XML (OOXML) format used by Excel 2007
Multiple worksheets can be added to a workbook and formatting can be
applied to cells. Text, numbers, and formulas can be written to the cells.
This module cannot, as yet, be used to write to an existing Excel XLSX