Google Sheets Python API
PowerShell module to import/export Excel spreadsheets, without Excel
C++ library for creating XLSX files for MS Excel 2007 and above.
Microsoft Excel add-in used to shorten repetitive tasks.
Populates dates, higlights business days and fiscal month start dates.
Compares two Excel files on a cell-by-cell basis and dumps differences
Perform automatic: compare,copy,delete,merge,format,password removal