XlsXcessive is a free and cross-platform Python library which will allow developers to add Excel 2007 compatible spreadsheet generation capabilities to their apps.
XlsXcessive is a simple interface to an excessive file format.
XlsXcessive makes generating Excel compatible OOXML spreasheets easy. XlsXcessive supports common features like multiple cell data types, formulas, styles, merged cells and multiple worksheets.